# IBM ThinkPad Butterfly keyboard

> foldout laptop computer keyboard

**Wikidata**: [Q5969090](https://www.wikidata.org/wiki/Q5969090)  
**Source**: https://4ort.xyz/entity/ibm-thinkpad-butterfly-keyboard

## Summary
The IBM ThinkPad Butterfly keyboard is a foldout laptop computer keyboard designed to expand the typing area when the laptop is opened. It was part of the IBM ThinkPad 701 series and allowed for a full-sized keyboard in a compact laptop form factor.

## Key Facts
- Part of: IBM ThinkPad 701
- Freebase ID: /m/02bx06
- Subclass of: computer keyboard
- Wikipedia languages: Japanese (ja), Chinese (zh)
- Wikidata description: foldout laptop computer keyboard
- Sitelink count: 2

## FAQs
### Q: What makes the IBM ThinkPad Butterfly keyboard unique?
A: The IBM ThinkPad Butterfly keyboard features a foldout design that expands when the laptop is opened, providing a full-sized typing experience in a compact form factor.

### Q: Which ThinkPad model used the Butterfly keyboard?
A: The Butterfly keyboard was specifically designed for and used in the IBM ThinkPad 701 series.

### Q: How does the Butterfly keyboard work?
A: The keyboard splits in the middle and slides outward when the laptop lid is opened, creating a wider typing surface that accommodates a full-sized keyboard layout.

## Why It Matters
The IBM ThinkPad Butterfly keyboard represented an innovative solution to a fundamental challenge in laptop design: how to provide a comfortable, full-sized typing experience in an increasingly compact form factor. At a time when laptops were becoming more portable but keyboards were shrinking, this mechanism allowed users to enjoy the benefits of a larger keyboard without sacrificing the portability of a smaller device. The design demonstrated IBM's commitment to user experience and ergonomic considerations in mobile computing, influencing future laptop keyboard designs and showcasing how mechanical innovation could solve space constraints in portable technology.

## Notable For
- Innovative foldout mechanism that expanded keyboard width when laptop opened
- First mass-market implementation of expanding keyboard technology in laptops
- Enabled full-sized keyboard experience in compact laptop form factor
- Part of the iconic ThinkPad 701 "Track Write" series
- Demonstrated mechanical engineering solution to space constraints in mobile computing

## Body
### Design and Mechanism
The Butterfly keyboard utilized a unique sliding mechanism where the keyboard physically split and expanded outward when the laptop lid was opened. This mechanical design allowed the keyboard to transform from a compact configuration suitable for travel to a full-sized typing surface when in use.

### Technical Implementation
The mechanism required precise engineering to ensure smooth operation and durability. The keyboard sections had to align perfectly when closed and slide smoothly when opened, maintaining consistent key spacing and tactile feedback throughout the expansion process.

### Historical Context
Developed during the early 1990s when laptop portability was becoming increasingly important but keyboard usability remained a significant challenge. The Butterfly keyboard represented a creative solution to the competing demands of portability and usability in mobile computing.

### Impact on Laptop Design
While the specific Butterfly mechanism wasn't widely adopted by other manufacturers, it influenced thinking about keyboard design in portable computers and demonstrated that mechanical innovation could address ergonomic challenges in mobile devices.