TECO-10 Abstract TECO-10 is a considerably extended version of TECO. It is based on XTEC, rather than DECsystem-10 TECO, so it is a compiler, not an interpreter. It includes essentially all of the features of XTEC (although some have been renamed for compatability with TECO-11 and TECO-8). It includes window support (written in TECO-10 so it can be customized easily!). Terminals supported are VT52, VT61, VT100 (in VT52 mode), and VT05. Any q-register can be made to function as the text buffer, and files can be read or written to/from any q-register, so several files can be edited at once. Two screen-editing subsystems are available written in TECO-10. These are VT and VTEDIT. Both are included with TECO-10. TECO-10 is mostly compatable with TECO-11, TECO-8 and TECO-VAX TECO-10 will run on either the DECsystem-10 or the DECsystem-20 (under feature-test).