# Logitech TrackMan Stationary Mouse (1991)

> trackball from 1991

**Wikidata**: [Q135904386](https://www.wikidata.org/wiki/Q135904386)  
**Source**: https://4ort.xyz/entity/logitech-trackman-stationary-mouse-1991

## Summary
The Logitech TrackMan Stationary Mouse (1991) is a stationary trackball pointing device released by Logitech in 1991. It features a fixed design with a trackball controlled by the user's thumb or finger, three push-buttons, and a DE-9 connector for connectivity.

## Key Facts
- Published in 1991 by Logitech.
- Classified as an electronic device model and a subclass of trackball.
- Features a DE-9 connector for computer connectivity.
- Contains three push-buttons but no scroll wheel.
- Manufactured by Logitech, a Swiss peripheral company founded in 1981.
- Also known as "TrackMan Stationary Mouse" in aliases.

## FAQs
### Q: What is the Logitech TrackMan Stationary Mouse (1991)?  
A: It is a stationary trackball pointing device released by Logitech in 1991, requiring no mouse movement since users roll a built-in ball to control cursor positioning.

### Q: What distinguishes the Logitech TrackMan Stationary Mouse from regular mice?  
A: Unlike traditional mice that require surface movement, this device remains stationary while users manipulate a thumb-operated trackball, reducing workspace needs and arm fatigue.

### Q: How was the Logitech TrackMan Stationary Mouse powered?  
A: The device utilized a DE-9 connector for wired connectivity, as no power specifications or wireless capabilities are documented in the source material.

### Q: Were there notable ergonomic features in this model?  
A: While no explicit ergonomic details are provided, its stationary design inherently offered reduced arm strain compared to traditional mice, aligning with Logitech's focus on user comfort.

## Why It Matters
The Logitech TrackMan Stationary Mouse (1991) represented an early evolution in pointing device ergonomics, particularly for users with limited desk space or mobility constraints. Its stationary design addressed a critical usability gap by enabling cursor control without a mouse pad or large surface movement—a solution later refined in professional and accessibility contexts. Though it lacked a scroll wheel (a feature emerging in the late 1990s), its core concept of trackball-based navigation influenced subsequent Logitech innovations and established a precedent for stationary peripherals in computing. This model underscored Logitech's role in diversifying input device options beyond conventional mice, catering to niche markets like industrial design and accessibility where precision and stability were paramount.

## Notable For
- Pioneering a completely stationary trackball design that eliminated the need for horizontal surface movement.  
- Featuring a DE-9 connector—an industry standard in the early 1990s preceding USB adoption.  
- Incorporating three push-buttons without a scroll wheel, reflecting 1991-era peripheral design constraints.  
- Being one of Logitech's early consumer stationary trackballs, expanding their portfolio beyond traditional mice.  
- Its thumb-controlled trackball mechanism, which later became a hallmark of ergonomic pointing devices.

## Body
### Design and Components
- **Trackball Mechanism**: Utilized a fixed-position trackball controlled by user's thumb or finger for cursor movement.  
- **Buttons**: Equipped with three push-buttons for standard mouse functions (e.g., left-click, right-click).  
- **Connectivity**: Featured a DE-9 connector for wired computer attachment, a common interface in 1991.  
- **Ergonomics**: Stationary design required minimal desk space, reducing arm strain compared to moving mice.  

### Manufacturing and Release
- **Brand**: Manufactured under Logitech, the Swiss peripheral company founded in 1981.  
- **Publication Date**: Officially released in 1991, aligning with the early trackball market expansion.  
- **Industry Context**: Preceded scroll-wheel technology, which became mainstream in the mid-1990s.  

### Technical Specifications
- **Classification**: Falls under "electronic device model" and "trackball" as per hierarchical taxonomy.  
- **Absence of Features**: Explicitly documented as lacking a scroll wheel, distinguishing it from later models.  
- **Aliases**: Also referred to as "TrackMan Stationary Mouse" in supplementary identifiers.  

### Related Entities
- **Organization**: Logitech served as manufacturer, with headquarters in Lausanne, Switzerland, and Newark, California.  
- **Peripheral Class**: Operated within the trackball category, a subclass of pointing devices with 37 Wikidata sitelinks.  
- **Components**: Contained three push-button mechanisms, a simple mechanical element for input control.