I think it means it's not rewritable.
Compact Disc-Read Only Memory
Yes
Compact disc - Read only memory
Compact Disk Read Only Memory
CD-ROM
Compact Disk Read-Only-Memory.Read-only-memory refers to a long-term memory solution. You have it in your computer under the form of a hard drive. Files and programs are stored in Read-Only-Memory then transferred to Random-Access-Memory (RAM, usually called "memory" by the average person) to work with.Compact disk is just the name of the technology used to store the data.
CD ROM stands for Compact Disc Read-Only Memory. A standard CD can be written to or read from, but a CD-ROM is loaded with pre-installed software for the user.
compact disc
Compact Disk Read Only Memory.
Compact Disk - Read Only Memory
Compact Disk Read Only memory.
It is called a CD-ROM Disc.