Acronym for Computer Output to Laser Disk.The storage of data on optical disk, such as CD-ROMs. Storing large volumes of data on laser disk, as opposed to microfiche or microfilm, lets the user access and search this information on a computer, avoid the duplication and security costs of protecting physical documents or film, and more readily distribute information.
(1) In DOS systems, the name of a serial communications port. DOS supports four serial ports: COM1, COM2, COM3, and COM4. However, most software uses system interrupts to access the serial ports, and there are only two IRQ lines reserved. This means that the four COM ports share the same two IRQ lines. Typically, COM1 […]
The DOS file that contains the DOS command processor.
- COM file
In DOS environments, a COM file is an executable command file with a.COM filename extension. COM files can be directly executed and are usually slightly smaller than equivalent EXE files. However, COM files cannot exceed 64K, so large programs are usually stored in EXE files.
The configuration file for DOS systems. Whenever a DOS computer boots up, it reads the CONFIG.SYS file (if it exists) and executes any commands in it. The most common commands are BUFFERS= and FILES=, which enable you to specify the buffer size and the number of files that can be open simultaneously. In addition, you […]
Short for Certified Output Protection Protocol, COPP is a device driver technology used to enable high-bandwidth Digital Content Protection (HDCP) during the transmission of digital video between applications and high-definition displays. COPP is a Microsoft security technology for video systems that require a logo certification. For security drivers are authenticated and protected from tampering to […]