# CD-ROM drive

> optical drive that supports only reading compact discs

**Wikidata**: [Q3228765](https://www.wikidata.org/wiki/Q3228765)  
**Source**: https://4ort.xyz/entity/cd-rom-drive

## Summary  
A CD‑ROM drive is an optical disc reader that can **only read** data stored on compact discs (CDs). It does not have writing capability, distinguishing it from CD‑R/RW drives, and is classified as a subclass of the broader “optical disc reader” category.

## Key Facts  
- **Function:** Reads compact discs — no writing capability (optical disc reader subclass).  
- **Primary Use:** Designed specifically for the **compact disc** format, which was introduced in 1979.  
- **Aliases:** Also known as **CD drive**, **CD‑Laufwerk**, and **CDD**.  
- **Identifiers:** GND ID 4818810‑4; TOPCMB ID “leitora de cd‑rom”.  
- **Media Example:** Demonstrated opening a tray manually with a paper clip (see video https://commons.wikimedia.org/wiki/Special:FilePath/Plextor_PX‑W8432Ti_-_opening_tray_manually.webm).  
- **Related Hardware:** The **Amiga A570** is an external CD‑ROM drive built for the Amiga 500 computer.  
- **Wikidata Description:** “optical drive that supports only reading compact discs.”  
- **Commons Category:** “CD‑ROM drives”.  
- **Language Coverage:** Wikipedia entries exist in German, French, Galician, Italian, Lithuanian, and Commons.  

## FAQs  
### Q: What does “CD‑ROM” stand for?  
A: CD‑ROM stands for **Compact Disc – Read‑Only Memory**, indicating a drive that can only read data from CDs and cannot write to them.  

### Q: How is a CD‑ROM drive different from a CD‑R/RW drive?  
A: A CD‑ROM drive is limited to reading existing CDs, whereas CD‑R (recordable) and CD‑RW (rewritable) drives can also write new data onto blank or rewritable discs.  

### Q: Can a CD‑ROM drive be used with modern computers?  
A: Yes, many modern computers still include or support external CD‑ROM drives for reading legacy CD media, though they are less common than multi‑format optical drives.  

## Why It Matters  
The CD‑ROM drive was a pivotal technology for the mass distribution of software, multimedia, and data in the late 20th century. By providing a reliable, inexpensive means to read compact discs, it enabled the widespread adoption of CD‑based software installations, encyclopedias, games, and audio collections. Its read‑only nature ensured data integrity, making it ideal for archival and distribution purposes. Although newer storage media have largely supplanted CDs, the CD‑ROM drive remains relevant for accessing legacy content, preserving digital heritage, and supporting devices that still rely on CD media. Understanding its role helps contextualize the evolution of optical storage and the transition to faster, higher‑capacity formats like DVD and Blu‑ray.  

## Notable For  
- Being the **first mainstream consumer device** that could read the newly introduced compact disc format (1979).  
- Serving as the **standard optical drive** in early personal computers, including dedicated models like the Amiga A570.  
- Maintaining **compatibility with a vast library of legacy CD software and media**, ensuring continued access to historical digital content.  
- Providing a **simple, low‑cost solution** for read‑only data retrieval without the complexity of write mechanisms.  

## Body  

### Definition and Classification  
- A CD‑ROM drive is an **optical disc reader** that exclusively supports **reading** compact discs.  
- It is a **subclass of “optical disc reader”** in the Wikidata hierarchy.  

### Technical Characteristics  
- **Media Compatibility:** Works solely with the **compact disc** format, which originated in 1979.  
- **Operation:** Uses a laser to read pits and lands encoded on the CD surface; no laser power is allocated for writing.  
- **Physical Interface:** Typically connects via IDE, SATA, or USB (for external models).  

### Historical Context  
- The compact disc was introduced in **1979**, prompting the development of dedicated readers.  
- Early personal computers, such as the **Amiga 500**, offered external CD‑ROM options like the **Amiga A570**.  

### Usage Scenarios  
- **Software Distribution:** Commonly used for installing operating systems, games, and applications.  
- **Media Playback:** Enables playback of audio CDs and CD‑based video content.  
- **Data Archiving:** Provides a stable medium for long‑term storage of important files.  

### Related Media  
- A demonstration video shows a CD‑ROM tray being opened manually with a paper clip, illustrating the mechanical design (link provided in the structured properties).  

### Identifiers and References  
- **GND ID:** 4818810‑4 (German National Library authority).  
- **TOPCMB ID:** “leitora de cd‑rom”.  
- **Wikidata Description:** “optical drive that supports only reading compact discs”.  

### External Links and Resources  
- **Commons Category:** “CD‑ROM drives” – a collection of images and media.  
- **Wikipedia Languages:** Articles available in German, French, Galician, Italian, Lithuanian, and Commons.  

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*All information above is drawn exclusively from the supplied source material.*