Currently most Zip Drives are portable external add-ons, however, internal Zip Drives are optional on some computers. This information can be accessed, but it can not be changed on the disk. Files from the CD can be copied t the Hard Drive and changed there, but the information on the CD will not be changed. The devices that record information on CDs are not common and are very expensive. Current models range from 8x to 24x.
Modems are devices that connect the computer to a phone line.
With this device a computer can access a computer at a remote location and exchange information. This is how most home users access the Internet and World Wide Web. Modems are categorized by how many bytes per second they can deliver over the phone line. Currently modems range from 14.4 Kb to 56 Kb. Without this program, the computer is just a collection of electronic equipment.