ZOC is a popular computer-based terminal emulator and Telnet software client for the Microsoft Windows and Apple Macintosh OS X (Mac OS X) operating systems that supports telnet, modem, SSH 1 and 2, ISDN, serial, TAPI, Rlogin and other means of communication. Its terminal emulator supports Xterm emulation with full colors, meta-keys and local printing, VT102, VT220 and several types of ANSI as well as Wyse, TVI, TN3270, and Sun's CDE.