CD-ROM Technology: It Stands for "Compact Disc Read-Only Memory." A CD-ROM is a CD which can be read by a computer through an optical drive. The "ROM" part of the word means the data on the disc is "read-only," or can’t modify or erased. Since of this feature and their big capacity, CD-ROMs are a huge media format for retail software. The primary CD-ROMs could hold around 600 MB of data, however now they can hold up to 700 MB. CD-ROMs share similar technology as audio CDs; however they are formatted differently, permitting them to store numerous kinds of data.