TECO version history

Version	Best available dating	Source	Comment
21A	1970-08-18	https://sky-visions.com/dec/tops503/src/teco.21a	DEC version.
175	1970-04	AIM 194
175	1971-10	RFC 254
187	(1971-04)	TAPE n
191	(1971-04)	TAPE n
206	1971-09-19	AIM 147A
209	1971-09-22	TAPE 39
210	1971-09-22	TAPE 39
214	1971-04-05	TAPE 1037
215	1971-04-15	TAPE 1037
335	1972-11-06	TAPE 1066	Has ^R mode by CMM
.; @ TECO	1972-12-22	TAPE 1062	Must be older.
NTECO 107	1973-01-27
NTECO 108	1973-03-04		Still CMM.
366	1973-09-26	https://www.saildart.org/INFO.ITS%5BUP,DOC%5D
368	1973-09-20	TECO ARCHIV	^R mode rewritten by RMS.
377	1973-11-09	TECO ARCHIV
379	1973-12-03	TAPE 1091
380	1973-12-06	TAPE 1091
387	1973-12-13	TECO ARCHIV
393	1973-12-25	TECO ARCHIV
396	1974-01-06	TECO ARCHIV
397	1974-01-12	TECO ARCHIV
401	1974-02-03	TECO ARCHIV
407	1974-06-15	TECO ARCHIV
422		TECO ARCHIV
430	1974-08-03	TECO ARCHIV
430	1974-09-07	TAPE 1117
438	1974-12-31	TECO ARCHIV
444	1975-01-05	TECO ARCHIV
467	1975-08-18	TECO ARCHIV
473	1975-08-25	TECO ARCHIV
475	1975-08-26	TECO ARCHIV
477	1975-09-10	TAPE 1184
477	1975-09-14	TECO ARCHIV
495	1976-10-17	TECO ARCHIV
504	1976-11-09	TECO ARCHIV	340 display no longer supported.
508	1976-11-25	AI TAPE 1231	Host for EMACS versions 24 and 45.
508	1976-11-26	TECO ARCHIV
514	1977-01-03	TECO ARCHIV
520	1977-03-07	TECO ARCHIV
520	1977-03-10	TECO ARCHIV	Yes, twice.
523	1977-06-14	TECO ARCHIV
524	1977-06-19	TECO ARCHIV
543	1977-09-27	TECO ARCHIV	Source file moved to .TECO.
584	1977-12-10	MC TAPE 1029
1011	1980-08-01	TECO ARCHIV	Last entry in file.
1212	1985-07-11	Snapshot	Last MIT edit.