lib3270 Introduction

lib3270 is a IBM 3270 terminal emulator library for C applications. 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.

lib3270 emulates one of four models of an IBM 3278 or 3279 terminal. The difference between the various models is the screen size.

lib3270 supports the APL character set and several international character sets. Many APL and international symbols may be entered by their X11 symbol names.