st: Documentation of when commands and features were introduced

[Clyde Schechter <clyde.schechter@gmail.com>]

I work with a number of colleagues who are still using earlier
versions of Stata (some back as far as 9.2), but who are not in a
position to upgrade.

An increasingly frequent scenario is that they will e-mail me a
question about how to do something, and I'll e-mail them back a
snippet of code.  Then they e-mail back that my code doesn't work
because some command is not recognized, or because some feature (e.g.
using /// to break a command over more than one line, or the use of
factor variables, or an -egen- function) is not supported in their
version.

As the gap between my version and theirs has grown, this problem
arises more and more often.  I try to remember what was introduced
when, but at this point, there is too much for me to keep in my head.
And due to considerations of storage space, I have not saved my old
manuals.

Does anyone know of any resource that lists commands and features and
at what version they were introduced?  It would be a huge help.

Thanks in advance.

Clyde Schechter
Dept. of Family & Social Medicine
Albert Einstein College of Medicine
Bronx, NY, USA
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