![]() ![]() Since TECO itself was written in assembly language for the PDP-10, it was fairly quickly moved to TENEX and TOPS-20. The first, EMACS, one of the first screen editors, was implemented in TECO macros on the ITS operating system at MIT. Less-often used commands are invoked by name, after typing an 'execute named command' command key. Most commands are not on regular printing keys, but 'Control' and 'Meta' keys (the former part of standard ASCII, the latter ASCII codes with the high bit in the byte set). It is generally not 'moded' characters typed as input are immediately inserted into the current buffer, or acted upon as a command. Multiple ' windows' (actually, divisions of the main window) are standard, as are multiple buffers. ![]() ![]() The Emacs editors are a group of extensible screen editor text editors, united in having a common user interface. ![]()
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