<HTML> <TITLE>s3270 Introduction</TITLE> <H1>s3270 Introduction</H1> s3270 is a scripted IBM 3270 terminal emulator. It can be used to communicate with any IBM host that supports 3270-style connections over TELNET. It can also communicate with hosts that use line-by-line ASCII mode to do initial login negotiation before switching to full-screen 3270 mode. <P> s3270 emulates one of four models of an IBM 3278 or 3279 terminal. The difference between the various models is the screen size. The emulation is not quite complete; s3270 understands extended field orders but does not implement some of the extended attributes (outlining, extended validation, etc.). It does not support 3179G bit-mapped graphics (GDDM). <P> s3270 supports the APL character set and several international character sets. Many APL and international symbols may be entered by their X11 symbol names.