The https://home.att.net/~efelberbaum/digiac.htm web page dedicated to the digiac 3080 seems to be gone (except perhaps from the internet archive wayback machine.)

Viewing the picture in the show notes, the 3080 is completely contained within the desk in the foreground.  The Selectric I/O writer and the switch/light panel atop the desk were two of the ways to load programs.  There also was a paper tape reader and punch on the front side of the desk to the right of the man in the dark jacket.  The 3080 I used also had a card reader but I do not see one in the picture.

The 3080 had 4096 words of memory, and each word contained 25 bits.  There was no stack and program execution ran slowly, at about 1000 instructions per second.  These machines were used for education; numerous hackers of my generation first got the thrill of a machine following our instructions on a digiac 3080.

PS:
 I try to pronounce gnu with a silent G.