Editing TRSDOS (section)

===Dates===
* October, 1979 – Radio Shack releases TRSDOS 2.3
* May 1, 1981 – Radio Shack releases Model III TRSDOS 1.3
* April 26, 1983 – Radio Shack introduces TRSDOS Version 6.0 with the new Model 4s
* 1984 – Radio Shack releases Version 6.2, the definitive version for the Model 4<ref>{{cite web |title=1985 Radio Shack Computer Catalog RSC-12 page 28 |url=http://www.radioshackcatalogs.com/html/catalogs_extra/1985_rsc-12/h028.html |website=radioshackcatalogs dot com |publisher=Tandy/Radio Shack |accessdate=May 7, 2019}}</ref>
* 1984 – Logical Systems publishes ''The Source'', the commented assembler source code to TRSDOS 6.2<ref name="the-source">{{cite web |title=The Source |url=http://www.trs-80.org/the-source/ |website=trs-80 dot org |publisher=Matthew Reed |accessdate=May 21, 2019}}</ref>
* Late 1986 – Logical Systems releases LS-DOS 6.3, the functionally equivalent update to TRSDOS 6.2. From this date, Tandy/Radio Shack ships it with the Model 4D.