They can be used by thousands of users at the same time, but they need to be accessed through so-called terminals. Mainframes are large servers which are mainly used by businesses for large scale data processing. Overview: TN3270 is a terminal emulation standard developed by IBM to access Mainframes. Is a professional and feature-rich TN3270 which lets you access IBM zSeries and iSeries mainframes via normal or secure (SSL) telnet connections from a Windows PC or Mac. Ericom Terminal Emulator software for Mac OS X supports TN3270, TN5250 among 35 types of emulators. Major features of the emulation include color, extended. Tn3270 is a terminal emulation program for connecting to computers which use IBM 3270 terminals.
