what is ROM?

ROM stangs for Read Only Memory those commands and programs which are necessary are saved at ROM because they cannot be changed and are required to start a PC, some of MS DOS commands are also put in ROM

when i heard about ROM i usually think.. it is use for CD's.. burning, reading files, watching movies, playing music cd's.

ROM stands for read only memory.It is a firmware and consist of certain set instruction,required at the boot time.

ROM is an acronym for Read-Only Memory. It refers to computer memory chips containing permanent or semi-permanent data. Unlike RAM, ROM is non-volatile; even after you turn off your computer, the contents of ROM will remain. Almost every computer comes with a small amount of ROM containing the boot firmware. This consists of a few kilobytes of code that tell the computer what to do when it starts up, e.g., running hardware diagnostics and loading the operating system into RAM. On a PC, the boot firmware is called the BIOS. Originally, ROM was actually read-only. To update the programs in ROM, you had to remove and physically replace your ROM chips. Contemporary versions of ROM allow some limited rewriting, so you can usually upgrade firmware such as the BIOS by using installation software. Rewritable ROM chips include PROMs (programmable read-only memory), EPROMs (erasable read-only memory), EEPROMs (electrically erasable programmable read-only memory), and a common variation of EEPROMs called flash memory.

When we say ROM, it is the abbreviation of Read Only Memory, like CD ROM, DVD ROM.