# ExpressCard

> interface and form factor for laptop computer peripheral devices

**Wikidata**: [Q1142441](https://www.wikidata.org/wiki/Q1142441)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ExpressCard)  
**Source**: https://4ort.xyz/entity/expresscard

## Summary  
ExpressCard is an interface and form factor standard for connecting peripheral devices to laptop computers. It replaced the older PC Card standard and supports both USB and PCI Express connections for added functionality.  

## Key Facts  
- **Replacement for PC Card**: ExpressCard succeeded the PC Card standard for laptop expansion cards.  
- **Supported Interfaces**: Uses USB and PCI Express for connectivity.  
- **Form Factors**: Includes ExpressCard/34 (34 mm wide) and ExpressCard/54 (54 mm wide).  
- **Parent Class**: Subclass of expansion card, which adds functionality to computer systems.  
- **Compatible Standard**: SxS flash memory is compliant with the ExpressCard standard.  
- **Aliases**: Also known as Express Card, NEWCARD, Express-Card, and others.  
- **Wikidata Description**: Defined as an "interface and form factor for laptop computer peripheral devices."  
- **Image Reference**: Depicts an ExpressCard connected to a laptop (available on Wikimedia Commons).  

## FAQs  
### Q: What replaced the PC Card standard?  
A: ExpressCard replaced the PC Card standard, offering faster connectivity through USB and PCI Express interfaces.  

### Q: What are the two main form factors of ExpressCard?  
A: ExpressCard comes in two sizes: ExpressCard/34 (34 mm wide) and ExpressCard/54 (54 mm wide).  

### Q: What types of connections does ExpressCard support?  
A: ExpressCard supports both USB and PCI Express connections, enabling faster data transfer and expanded functionality.  

## Why It Matters  
ExpressCard was a significant advancement in laptop expansion technology, addressing the limitations of the older PC Card standard. By supporting both USB and PCI Express interfaces, it provided faster data transfer rates and greater versatility for peripherals like external storage, network adapters, and graphics cards. Its compact form factors (34 mm and 54 mm) made it suitable for modern, slimmer laptops. Although largely supplanted by built-in ports and Thunderbolt technology, ExpressCard played a key role in bridging the gap between legacy expansion standards and contemporary connectivity solutions.  

## Notable For  
- **Dual Interface Support**: One of the first standards to integrate both USB and PCI Express in a single expansion card.  
- **Compact Design**: Offered smaller form factors (ExpressCard/34 and /54) compared to its predecessor.  
- **Backward Compatibility**: While not directly compatible with PC Cards, it provided a modernized alternative for similar use cases.  

## Body  
### Overview  
ExpressCard is an expansion card standard designed for laptops, enabling additional functionality through USB or PCI Express interfaces. It replaced the older PC Card standard, offering improved performance and smaller form factors.  

### Technical Specifications  
- **Interfaces**: Supports USB 2.0 and PCI Express ×1.  
- **Form Factors**:  
  - ExpressCard/34: 34 mm wide.  
  - ExpressCard/54: 54 mm wide.  
- **Compatibility**: SxS flash memory adheres to the ExpressCard standard.  

### Historical Context  
- **Predecessor**: PC Card (formerly PCMCIA).  
- **Development**: Created by Sony and SanDisk for broader adoption.  

### Usage and Applications  
- Common uses included external storage, networking, and graphics expansion.  
- Gradually phased out in favor of integrated ports and newer standards like Thunderbolt.  

### Recognition  
- Listed under categories such as "expansion bus," "bus," and "form factor" in Wikidata.  
- Featured in multiple language editions of Wikipedia, including English, Spanish, and Japanese.

## References

1. Freebase Data Dumps. 2013
2. Quora