HP Neoware e90 TeemTalk® 5.0 for Unix User's Guide - Page 13

Introduction 1 Introduction This chapter introduces the TeemTalk for Unix terminal emulation software and describes the scope of this User's Guide. What Is TeemTalk for Unix ? TeemTalk is the essential connectivity tool for X Window based UNIX environments, enabling non-X based applications to be run in the X environment. TeemTalk provides precise emulation of a wide range of industry standard text and graphics terminals with impressive additional features formulated to increase productivity and reduce network loading. These include file transfer, dynamic window sizing, hotspots, soft buttons, keyboard mapping, mouse button definition, customising capabilities, scripting language, and an optional Application Programming Interface (API). The X Window System & TeemTalk The X Window System is a network-based windowing system that provides a common graphical interface for application programs. It defines how applications create windows and the graphics displayed in them. X is based on a client-server model in which the client is the application program and the server controls the display and keeps track of user input. Communication between client and server can be achieved via networks, serial interfaces or internal operating system streams using standard X protocols. Since X is both window based and network oriented there can be multiple applications on the network creating individual windows on an individual display. The display is therefore providing a service to each application and hence is known as the X display server. The basic function of TeemTalk is to accept DEC, Tektronix, Retrographics, Westward, etc., command sequences from a host application (client) and convert them into equivalent X functions which can then be passed on to the X display server. This means that current investment in host application software can be retained in the X Windows environment. 1-1