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The IBM 3270 is a family of block oriented[1] display and printer computer terminals introduced by IBM in 1971[2] and normally used to communicate with IBM mainframes. The 3270 was the successor to the IBM 2260 display terminal.[3] Due to the text color on the original models, these terminals are informally known as green screen terminals. Unlike a character-oriented terminal, the 3270 minimizes the number of I/O interrupts required by transferring large blocks of data known as data streams, and uses a high speed proprietary communications interface, using coaxial cable.
IBM no longer manufactures 3270 terminals, but the IBM 3270 protocol is still commonly used[4] via TN3270[5] clients, 3270 terminal emulation or web interfaces to access mainframe-based applications, which are sometimes referred to as green screen applications.
- ^ 3270Intro.
- ^ "DPD Chronology 1971". ArchiveIETF. IBM. January 23, 2003.
- ^ "What is 3270 (Information Display System)".
3270 .. over its predecessor, the 2260
- ^ "Cleo 3270 Support Documentation".
IBM stopped manufacturing .. the IBM 3270
- ^ RFC2355.