NCSA Telnet This tree contains the most current available updates of NCSA Telnet for IBM PC and Mac. These programs allow these machines to use Telnet and FTP protocols to communicate with other machines via TCP/IP. Contributed software is also made available as appropriate, from the Zaphod FTP site. (zaphod.ncsa.uiuc.edu). NCSA Telnet gives a PC or Mac the ability to have multiple sessions, emulating terminals, concurrently active on one or more other hosts, multiple concurrent file transfers in either direction with some of these hosts, and the ability to log activities. A TCP/IP connection is needed for this; drivers are included for most setups. X applications are not directly supported, since this is NOT an X server, but some graphics modes are available via Tektronix emulation (in addition to VT emulation). The BYU version of Mac Telnet contains VT200 mode support; VT102 is the normal standard for the others.