[TenTec] Some advice, please

[JAMES HANLON]

Y'all,
 
I've taken on the job of talking to the Albuquerque Hamfest this coming August about significant advances in amateur radio technology from the beginning of radio, Marconi 1894, to the present.  I'm up to the early 70s so far and I have just added the advent of Solid State Transceivers to the list, using the 505 Argonaut and the Triton I and Triton II as examples.  I'm a little fuzzy on things more modern than that.  Obviously I should include things like digital modes and software-defined radios.  What would you folks suggest I should include, and can you cite any Ten-Tec or other gear that would illustrate the particular advance?
 
Thanks a lot for your help.
 
Jim, W8KGI