![]() ![]() This type of dumb terminal is still supported on modern Unix-like systems by setting the environment variable TERM to dumb. In this context dumb terminals are sometimes dubbed glass Teletypes, for they essentially have the same limited functionality as does a mechanical Teletype. Dumb terminals are those that can interpret a limited number of control codes (CR, LF, etc.) but do not have the ability to process special escape sequences that perform functions such as clearing a line, clearing the screen, or controlling cursor position. Connection to the mainframe computer or terminal server is achieved via RS-232 serial links, Ethernet or other proprietary protocols.Ĭharacter-oriented terminals can be "dumb" or "smart". ![]() It is the most common type of data terminal, because it is easy to implement and program. These systems were initially character based.Ī Televideo ASCII character mode terminalĪ character-oriented terminal is a type of computer terminal that communicates with its host one character at a time, as opposed to a block-oriented terminal that communicates in blocks of data. This configuration, known as the centralized or mainframe model, featured a powerful central computer that performed all the processing tasks, while terminals served as input/output devices for users to interact with the system. In the early days of computing, with the advent of interactive computing, the prevailing model involved a central computer connected to multiple terminals. Examples include the family of terminal control sequence standards known as ECMA-48, ANSI X3.64 or ISO/IEC 6429. Terminals usually support a set of escape sequences for controlling color, cursor position, etc. ![]() On Unix-like operating systems, it is common to have one or more terminal windows connected to the local machine. These may be running either on the same machine or on a different one via telnet, ssh, dial-up, or over a direct serial connection. A terminal emulator inside a graphical user interface is often called a terminal window.Ī terminal window allows the user access to a text terminal and all its applications such as command-line interfaces (CLI) and text user interface (TUI) applications. Though typically synonymous with a shell or text terminal, the term terminal covers all remote terminals, including graphical interfaces. Xterm, a terminal emulator designed for the X Window System Windows Terminal, an open-source terminal emulator for Windows 10 and Windows 11Ī terminal emulator, or terminal application, is a computer program that emulates a video terminal within some other display architecture.
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