Technology Icons

7,591 icons

10 families

85 sets

This Technology icons pack is part of a massive, consistent icon library at Streamline. These icon kits were crafted by in-house designers over a period of 12 years. It offers thousands of icons in multiple styles, all customizable and ready to download in PNG, SVG and JSX formats.

Ultimate Light

→

Clean line icon of ankle tracker with signal waves and straps. Used for monitoring and location tracking.

Clean line icon of a prosthetic arm with a mechanical hand. Used for prosthetics, robotics, and assistive technology.

Clean line icon of a bendable phone with a curved screen and dot. Used for flexible devices and tech UI.

Clean line icon of a phone with curved bend lines and a circular button. Used for flexible phones and touch devices.

Clean line icon of a person inside a body scanner. Used for medical imaging and diagnostics.

Clean line icon of a person in a rounded tube with bubbles. Used for lab samples and biology testing.

Clean line icon of a capsule in a curved tunnel. Used for hyperloop travel and transit apps.

Clean line icon of a speeding hyperloop pod with motion trails and a speed gauge. Used for transport, speed, and travel apps.

Clean line icon of a curved pod, map pin, and partial circular structure. Used for hyperloop stations and transit maps.

Clean line icon of two interlocking loops forming a horizontal infinity symbol. Used for looping, continuity, and connectivity.

Clean line icon of a ticket above a curved pod. Used for transit tickets, booking, travel apps, and transport UIs.

Clean line icon of a ticket above a curved shape with marks. Used for transit and travel.

Clean line icon of a looping hyperloop track with two arched rails. Used for transit, transport, and technology.

Clean line icon of round robot face on stand with side and top loops. Used for robotics, AI, avatars, and tech interfaces.

Clean line icon of a robot exoskeleton with two legs and feet. Used for robotics, prosthetics, and wearable tech.

Clean line icon of an articulated exoskeleton leg with circular joints and brace. Used for robotics and prosthetics.

Clean line icon of a robot exoskeleton suit with a ring above its helmet. Used for robotics and wearables.

Clean line icon of a projector with a lens, play triangle, and beams. Used for cinema, media, and presentations.

Clean line icon of a projector casting a play triangle on a screen. Used for presentations and video playback.

Ultimate Regular

→

Clean line icon of a square tracker with center circle and signal arcs. Used for ankle tracking and device monitoring.

Clean line icon of an artificial arm with a segmented hand and diagonal forearm. Used for prosthetics and accessibility.

Clean line icon of a bent phone with a rounded body, curved extension, and dot. Used for calls and phone support.

Clean line icon of a bending smartphone with a touch gesture mark. Used for foldable phones, touchscreen control.

Clean line icon of a person inside a body scanner frame. Used for screening, security, and medical imaging.

Clean line icon of a curved tunnel and streamlined pod. Used for hyperloop transit, high-speed travel, and transport technology.

Clean line icon of a looping arrow over sweeping speed lines. Used for hyperloop travel, high-speed transit, and motion.

Clean line icon of a curved track, capsule shape, and map pin. Used for hyperloop stations and transit locations.

Clean line icon of interwoven loops forming an infinity shape. Used for hyperloop transit and connectivity.

Clean line icon of a notched ticket above a streamlined capsule with motion lines. Used for transit, tickets, and travel apps.

Clean line icon of a ticket above a streamlined pod shape. Used for hyperloop travel, tickets, transit, and futuristic transport.

Clean line icon of a curved track between two looped ends. Used for hyperloop transit and transport concepts.

Clean line icon of a round robot head with two eyes and looped ears. Used for robotics, AI, and bot interfaces.

Clean line icon of an exoskeleton leg with a frame, joint, supports, and oval feet. Used for robotics and prosthetics.

Clean line icon of a robotic exoskeleton leg with joints and foot plates. Used for robotics, prosthetics, and automation.

Clean line icon of a robot exoskeleton suit with round helmet and side discs. Used for robotics, AI, and tech.

Clean line icon of a person inside a polaroid frame. Used for user profiles, avatars, and photo identity.

Clean line icon of a projector with lens, play triangle, and four dots. Used for presentations and video projection.

Clean line icon of an open box above a rounded base with six dots. Used for virtualization, containers, and cloud apps.

Ultimate Bold

→

Sharp solid icon of a rectangular ankle tracker with side signals and a band. Used for GPS tracking and ankle monitoring.

Bold solid icon of a segmented artificial arm with a circular joint detail. Used for prosthetics and robotics.

Bold solid icon of a bent smartphone with a curved top and round button. Used for flexible phones and mobile technology.

Clean solid icon of a bent smartphone with a touch dot. Used for flexible phone controls and touch gestures.

Bold solid icon of a person between scanning beams and sensor dots. Used for body scanning and security screening.

Bold solid icon of a rounded horizontal pod inside an open curved loop. Used for transit, transport, and futuristic travel.

Bold solid icon of a streamlined pod, speed lines, and gauge arc. Used for transit and performance.

Bold solid icon of a hand beneath a map pin and curved arc. Used for transit maps, stations, and location services.

Bold solid icon of two interlocking rounded loops. Used for hyperloop, transport, transit, and mobility systems.

Sharp solid icon of a ticket above a pod and curved track. Used for transit tickets, rail travel, and hyperloop apps.

Sharp solid icon of a ticket above a streamlined hyperloop pod and curved track. Used for transit tickets and travel apps.

Bold solid icon of a looping track with a central pointed rail. Used for hyperloop transit, rail travel, and transportation.

Bold solid icon of a rounded robot face with two eyes and a pedestal base. Used for AI, robotics, and automation.

Bold solid icon of a robotic exoskeleton leg. Used for robotics, prosthetics, and wearable technology.

Sharp solid icon of an articulated robotic exoskeleton leg. Used for robotics, prosthetics, and automation.

Sharp solid icon of a robot exoskeleton suit. Used for robotics, sci-fi armor, and technology.

Bold solid icon of a projector casting a triangular beam with rounded light marks. Used for projection, presentations and media.

Bold solid icon of a video projector with a central play triangle, four buttons, and lens. Used for presentations and media.

Ultimate Duotone

→

Clean duotone icon of a brain with circuit nodes and a center divider. Used for AI, neuroscience, and technology.

Clean duotone icon of a brain outline with circuit lines and nodes. Used for AI, neuroscience, and technology.

Clean duotone icon of a brain outline surrounding a square microchip. Used for AI, machine learning, and neural computing.

Clean duotone icon of seven connected hexagons in a honeycomb pattern. Used for DNA, biology, and genetics.

Rounded duotone icon of a robot face with screen eyes and chest panel. Used for AI, robotics, and automation.

Clean duotone icon of a robot head with antenna, eyes, ears, and mouth. Used for AI, robotics, and automation.

Clean duotone icon of stacked circular panels paired with gears. Used for user settings and customization controls.

Clean duotone icon of a tracker with antennas, signal arcs, and a flared ankle band. Used for ankle monitoring.

Clean duotone icon of a segmented prosthetic arm and mechanical hand. Used for prosthetics, robotics, and assistive tech.

Clean duotone icon of a bent phone with a curved screen. Used for foldable devices and flexible displays.

Clean duotone icon of a bent smartphone with a touch screen. Used for foldable phones and mobile interaction.

Clean duotone icon of a person between two scanner rails. Used for security screening and imaging.

Rounded duotone icon of a circular robot head with two eyes, ears, top knobs, and a base. Used for AI, robotics, and bots.

Clean duotone icon of a person silhouette in a polaroid frame with dots. Used for profiles, photos, and user identity.

Clean duotone icon of a screen with play triangle and projector. Used for video, presentations, and media.

Clean duotone icon of a projector with a play triangle and projected beam. Used for presentations, video playback, and projection.

Clean duotone icon of a 3D box above an open tray. Used for virtualization, containers, and storage.

Clean duotone icon of two 3D boxes above a rounded base with a circular center. Used for virtual storage and 3D assets.

Ultimate Colors

→

Playful creative icon of a brain with branching paths and five green nodes. Used for AI, cognition, and neuroscience.

Playful creative icon of a brain with a central split and green neural nodes. Used for AI, neuroscience, learning, and ideas.

Playful creative icon of a microchip inside a brain. Used for AI and machine learning.

Playful creative icon of linked blue hexagonal shapes arranged like a DNA strand. Used for genetics, biology, and biotech.

Playful creative icon of a robot face with green eyes, side arcs, and a chest panel. Used for robotics, AI, and tech.

Playful creative icon of a robot head with antenna, ears, green eyes, and mouth. Used for AI, robotics, and chat.

Playful creative icon of a human head silhouette containing a gear. Used for settings, profiles, and personalization.

Playful creative icon of stacked colored partial circles beside gray gears. Used for settings and themes.

Playful creative icon of a blue-screen ankle device with signal waves and a gray strap. Used for tracking and wearables.

Playful creative icon of a segmented artificial arm and rounded hand. Used for prosthetics, robotics, and assistive tech.

Playful creative icon of a bendable phone with gray left and blue screens. Used for flexible devices and mobile technology.

Playful creative icon of a bent phone with a blue screen, yellow button, and touch mark. Used for foldable tech and touch UI.

Playful creative icon of a person between two scanner towers. Used for body scans and security screening.

Playful creative icon of a round robot head with ears, green eyes, and a stand. Used for robotics and AI.

Playful creative icon of a projector casting a blue beam with a yellow play triangle. Used for presentations and projection.

Playful creative icon of a video projector with a triangular play symbol and light rays. Used for presentations, film, and video.

Playful creative icon of a green cube above a blue tray and gray wheeled base. Used for virtual machines and containers.

Playful creative icon of two green boxes above a gray rounded device. Used for packaging and 3D design.

Core Line

→

Clean line icon of a diagonal wand with three sparkles inside a circle. Used for AI retouching and editing tools.

Clean line icon of a chess knight piece with a four-point sparkle. Used for AI strategy, chess, and game interfaces.

Minimal line icon of a brain with circuit paths and a central divide. Used for AI, neural networks, and tech.

Clean line icon of a brain outline with a microchip in the upper right. Used for AI, machine learning, and neural technology.

Clean line icon of a brain outline with a centered lightning bolt. Used for cognition, ideas, energy, and mental performance.

Clean line icon of a robot above a chessboard with a curved arrow. Used for AI strategy, chess, and game planning.

Clean line icon of a face scan with corner brackets and warning triangle. Used for deepfake detection and media verification.

Minimal line icon of a circuit-linked face in a rounded frame. Used for deepfake detection, AI, and face analysis.

Minimal line icon of a face target with crosshair bars and corner brackets. Used for deepfake detection.

Clean line icon of two face circles with up and down arrows. Used for deepfake detection and AI media.

Clean line icon of an angular bent arrow beside a four-point sparkle. Used for AI automation, workflows, and magic actions.

Clean line icon of a browser window with a four-point sparkle. Used for AI browsing, web tools, and smart search.

Clean line icon of a chat bubble with a four-point sparkle. Used for AI chat, assistants, and smart messaging.

Clean line icon of a rounded microchip with pins and a four-point sparkle. Used for AI tools and chip technology.

Clean line icon of a cloud outline with a four-point sparkle below. Used for AI, cloud computing, and smart features.

Minimal line icon of a database cylinder with a four-point sparkle. Used for AI data, smart databases, and automation.

Clean line icon of a diagonal pencil with a four-point sparkle. Used for editing, writing, design, and AI-assisted creation.

Clean line icon of an envelope with a four-point sparkle. Used for AI email generation and smart messaging.

Core Solid

→

Clean solid icon of a diagonal magic wand with four sparkles. Used for AI retouching and enhancement tools.

Sharp solid icon of a chess knight with a four-point star. Used for AI strategy, chess, and game interfaces.

Sharp solid icon of a split brain with circuit-like cutouts. Used for AI, machine learning, neural networks, and technology.

Sharp solid icon of a brain with a microchip above it. Used for AI, machine learning, neural networks, and technology.

Bold solid icon of a brain with a lightning bolt cutout. Used for cognition, energy, and brainpower.

Sharp solid icon of a chess knight beside a robot head. Used for chess strategy, robotics, games, and AI.

Sharp solid icon of scan corners, face fragments, and warning triangle. Used for deepfake detection.

Sharp solid icon of a split face with circular nodes and a curved smile. Used for deepfake detection, AI, and facial analysis.

Clean solid icon of scan corners around a split face. Used for deepfake detection and face analysis.

Bold solid icon of a brain with three circuit nodes. Used for AI, deepfake tools, and synthetic media.

Sharp solid icon of bent arrows and divided circles. Used for deepfake, AI media, and synthetic content tools.

Bold solid icon of a cursor arrow overlapped by a four-point sparkle. Used for AI automation, workflows, and smart tools.

Bold solid icon of a browser window with a sparkle. Used for AI browsing, web tools, and smart search.

Bold solid icon of a chat bubble with a four-point sparkle. Used for AI chat, assistants, and messaging.

Bold solid icon of a rounded chip with a four-point sparkle cutout. Used for AI tools and smart features.

Bold solid icon of a cloud with a four-point sparkle cutout. Used for AI tools, cloud services, and smart features.

Clean solid icon of a database cylinder with a four-point sparkle overlay. Used for AI data, databases, and automation.

Sharp solid icon of a diagonal pencil with a four-point sparkle above it. Used for AI editing and writing tools.

Bold solid icon of an envelope with a four-point sparkle overlay. Used for AI email generation and writing tools.

Core Remix

→

Clean hybrid solid and line icon of a diagonal wand, three sparkles, and a circle. Used for AI retouching and image editing.

Clean hybrid solid and line icon of a chess knight, star, and base. Used for AI strategy, chess, and planning.

Clean hybrid solid and line icon of a stylized brain with circuit traces and nodes. Used for AI, ML, and neural networks.

Minimal hybrid solid and line icon of a brain outline with a microchip above it. Used for AI, machine learning, and neural tech.

Clean hybrid solid and line icon of a brain with a central lightning bolt. Used for ideas, intelligence, and neuroscience.

Clean hybrid solid and line icon of a robot head, chess knight, and board. Used for AI strategy and chess tactics.

Clean hybrid solid and line icon of a framed panel, slash, and warning triangle. Used for deepfake detection.

Clean hybrid solid and line icon of a face with circuit nodes. Used for deepfake detection and AI.

Clean hybrid solid and line icon of a gridded face inside scan corners. Used for deepfake detection and facial scanning.

Clean hybrid solid and line icon of a musical note with circuit nodes. Used for deepfake tech, AI audio, and media tools.

Clean hybrid solid and line icon of four symbols in a 2x2 grid. Used for AI media, identity checks, and authenticity.

Clean hybrid solid and line icon of an angular path beside a four-point sparkle. Used for automation workflows and AI tools.

Clean hybrid solid and line icon of a browser window with a sparkle. Used for AI tools, web apps, and smart features.

Clean hybrid solid and line icon of a speech bubble with a four-point sparkle. Used for AI chat and assistants.

Clean hybrid solid and line icon of a microchip with a four-point sparkle and pins. Used for AI tools, chips, and automation.

Clean hybrid solid and line icon of a cloud with a filled four-point sparkle. Used for AI, cloud tools, and smart features.

Minimal hybrid solid and line icon of a database with a four-point sparkle. Used for AI data and databases.

Clean hybrid solid and line icon of a pencil with a four-point sparkle. Used for editing, writing, and AI tools.

Clean hybrid solid and line icon of an envelope with a four-point sparkle. Used for AI email generation and writing tools.

Core Pop

→

Clean colored solid icon of a diagonal wand with three sparkles inside a circle. Used for AI retouching and image editing.

Clean colored solid icon of a chess knight with a star beside it. Used for AI strategy, chess, planning, and innovation.

Clean colored solid icon of a brain with circuit-like cutouts. Used for AI, machine learning, and neural networks.

Clean colored solid icon of a yellow brain with a blue microchip above it. Used for AI, machine learning, and technology.

Clean colored solid icon of a brain with a lightning bolt. Used for cognition, ideas, and mental energy.

Clean colored solid icon of a chess knight beside a robot head. Used for chess, strategy games, and AI.

Clean colored solid icon of a rounded screen, scan corners, and alert triangle. Used for deepfake detection.

Bold colored solid icon of a face in a rounded frame with circuit nodes. Used for deepfake detection and AI security.

Clean colored solid icon of a smiling face inside four corner brackets. Used for deepfake detection and identity checks.

Clean colored solid icon of a split brain with circuit nodes and coral half. Used for AI, deepfakes, and synthetic media.

Bold colored solid icon of curved arrows, a face circle, and a gridded globe. Used for deepfake detection and AI media security.

Bold colored solid icon of an angular A with a cyan center and blue sparkle. Used for AI automation, workflows, and apps.

Clean colored solid icon of a browser window with a four-point sparkle. Used for AI browsing, smart search, and web tools.

Clean colored solid icon of a chat bubble with a four-point sparkle. Used for AI chat, assistants, and messaging.

Rounded colored solid icon of a microchip with a four-point spark. Used for AI tools, chips, and smart technology.

Clean colored solid icon of a cyan cloud with dark blue sparkle below. Used for cloud storage and data services.

Clean colored solid icon of a database stack with a sparkle. Used for AI databases, data tools, and automation.

Clean colored solid icon of a diagonal pencil and four-point sparkle. Used for AI editing and creative tools.

Clean colored solid icon of an envelope with a sparkle. Used for AI email generation, writing tools, and smart messaging.

Core Duo

→

Clean duotone icon of a diagonal magic wand inside a circle with three sparkles. Used for AI retouching and photo editing.

Clean duotone icon of a chess piece with a four-point sparkle. Used for AI strategy, chess, and smart tools.

Clean duotone icon of a brain with circuit traces and a central node. Used for AI and machine learning.

Clean duotone icon of a brain with a microchip at the upper right. Used for AI, ML, neural networks, and technology.

Clean duotone icon of a brain with a lightning bolt. Used for brainstorming, cognition, AI, and energy features.

Clean duotone icon of a chess knight, robot head, and chessboard base. Used for strategy games and AI chess interfaces.

Clean duotone icon of a face in scan brackets with a warning triangle. Used for deepfake detection and media checks.

Clean duotone icon of a rounded face with a smile and three connected nodes. Used for AI, deepfake detection, identity tools.

Clean duotone icon of a rounded shield with four panes and a curved mark, framed by corner brackets. Used for deepfake detection.

Clean duotone icon of two circular faces with opposing curved arrows. Used for deepfake, face swaps, and synthetic media.

Clean duotone icon of a looping angular arrow with a four-point sparkle. Used for automation, AI tools, and workflows.

Clean duotone icon of a browser window with a four-point sparkle. Used for AI browsing and smart search.

Clean duotone icon of a speech bubble with a four-point sparkle. Used for AI chat, assistants, and smart messaging.

Clean duotone icon of a rounded microchip with pins and a four-point sparkle. Used for AI tools, automation, and machine learning.

Clean duotone icon of a cloud with a four-point sparkle below. Used for AI tools, cloud automation, and smart features.

Clean duotone icon of a database cylinder with a four-point sparkle. Used for AI data, databases, and automation.

Clean duotone icon of a tilted pencil with a four-point sparkle. Used for editing, writing, and AI tools.

Clean duotone icon of an envelope with a four-point sparkle. Used for AI email generation and smart compose.

Core Neon

→

Clean neon icon of a diagonal wand with three sparkles inside a circle. Used for AI retouching and image enhancement.

Clean neon icon of a chess knight with a sparkle above it. Used for AI strategy and chess interfaces.

Clean neon icon of a brain outline with blue circuit paths and nodes. Used for AI, machine learning, and neural networks.

Clean neon icon of a brain with a microchip above it. Used for AI, machine learning, and neural technology.

Clean neon icon of a brain outline with a lightning bolt. Used for ideas, intelligence, energy, and technology interfaces.

Clean neon icon of a robot head above a chess base with a winding arrow. Used for chess AI and strategy games.

Sharp neon icon of a blue shield, warning triangle, and purple corner brackets. Used for deepfake detection and media security.

Sharp neon icon of a rounded face with a grid, smile, and three linked circles. Used for deepfake detection and AI tools.

Clean neon icon of a shield face inside scan corners. Used for deepfake detection and identity checks.

Clean neon icon of two purple face circles and opposing blue arrows. Used for deepfake detection and AI media.

Clean neon icon of a bent arrow and four-point sparkle. Used for automation, AI tools, and workflow actions.

Clean neon icon of a browser window with two bars and a four-point sparkle. Used for AI tools and browsers.

Clean neon icon of a speech bubble with a four-point sparkle. Used for AI chat and messaging.

Clean neon icon of a rounded microchip with pins and a four-point sparkle. Used for AI, chips, and machine learning.

Clean neon icon of a purple cloud outline above a blue four-point sparkle. Used for AI, cloud, and smart features.

Clean neon icon of a database cylinder with a four-point sparkle. Used for databases, AI data tools, and automation.

Sharp neon icon of a pencil with a four-point sparkle. Used for AI editing, writing tools, and magic edit actions.

Clean neon icon of an envelope with a four-point sparkle. Used for AI email generation and writing tools.

Core Flat

→

Clean flat icon of a diagonal magic wand with three rounded sparkles inside a circle. Used for AI retouching and photo editing.

Clean flat icon of a chess knight, base, and four-point star. Used for AI strategy, chess, and planning.

Clean flat icon of a split brain with circuit traces. Used for AI, machine learning, neural networks, and technology.

Clean flat icon of a brain with circuit traces and a chip. Used for AI, machine learning, neural networks, and technology.

Clean flat icon of a brain with a central lightning bolt. Used for ideas, intelligence, and mental energy.

Clean flat icon of a robot head over a chess knight and base. Used for strategy games, robotics, and AI.

Clean flat icon of a shield, warning triangle, and scan corners. Used for deepfake detection and content security.

Clean flat icon of a rounded face with a cross, smile, and three linked circles. Used for deepfake detection and AI tools.

Minimal flat icon of a rounded face with a crosshair inside corner brackets. Used for deepfake detection and face scanning.

Clean flat icon of a split face with circuit nodes and lines. Used for deepfake detection, AI, and digital identity.

Clean flat icon of curved arrows and segmented circles. Used for deepfake, AI media, and synthetic content.

Clean flat icon of a blue arrow with a four-point sparkle. Used for AI automation, workflows and smart actions.

Clean flat icon of a browser window with a four-point sparkle. Used for AI web tools and smart browsing.

Clean flat icon of a speech bubble with a four-point sparkle. Used for AI chat, assistants, and messaging.

Clean flat icon of a rounded chip with a four-point spark and two pins. Used for AI tools, chips, and automation.

Clean flat icon of a cloud with a four-point sparkle beneath it. Used for cloud tools, AI, and weather.

Clean flat icon of a database cylinder with a four-point sparkle. Used for AI databases and data automation.

Minimal flat icon of a diagonal rounded tool with four sparkles. Used for AI editing, enhancement.

Clean flat icon of an envelope with a four-point sparkle. Used for AI email generation, email tools, and writing assistants.

Core Gradient

→

Clean gradient icon of a diagonal wand-like shape with three four-lobed spark shapes. Used for AI retouching and image editing.

Clean gradient icon of a chess knight with a four-point sparkle. Used for AI strategy, chess games, and decision-making.

Clean gradient icon of a split brain with circuit-like cutouts. Used for AI, machine learning, and neural networks.

Minimal gradient icon of a split brain and microchip. Used for AI, machine learning, neural networks, and tech interfaces.

Bold gradient icon of a four-lobed brain shape with a white lightning bolt. Used for neuroscience, cognition, and mental energy.

Clean gradient icon of a robot chess knight with two circular eyes. Used for strategy games, robotics, and AI interfaces.

Bold gradient icon of corner brackets, fragments, and a warning triangle with exclamation. Used for deepfake detection.

Minimal gradient icon of a split face with circular side shapes and a curved cutout. Used for deepfake and AI tools.

Sharp gradient icon of four rounded corner brackets around a split shield. Used for deepfake detection and media checks.

Clean gradient icon of a brain with circuit lines and round nodes. Used for deepfake technology, AI, and digital media.

Clean gradient icon of four abstract symbols in a 2x2 grid, with arrows and segmented circles. Used for deepfake and AI media

Bold gradient icon of a lightning bolt, curved arrow, and sparkle. Used for AI automation workflows.

Clean gradient icon of a browser window with a four-point sparkle. Used for AI features, browser tools, and smart search.

Clean gradient icon of a chat bubble with a four-point sparkle. Used for AI chat, assistants, and messaging.

Clean gradient icon of a rounded chip with a four-point sparkle. Used for AI tools and automation.

Clean gradient icon of a cloud with a four-point sparkle. Used for AI tools, cloud services, and generative features.

Clean gradient icon of stacked database cylinders with a four-point spark. Used for databases, AI, and data systems.

Clean gradient icon of a diagonal rounded wand with a four-point sparkle. Used for AI editing and magic tools.

Clean gradient icon of an envelope with a four-point sparkle. Used for AI email generation and writing tools.