A Couple points

Wait a minute – I made a mistake it is known colloquially as the admin dictionary, not the tech dictionary. I've corrected that now. My apologies! I'll try and bow out gracefully.

A contraction or shortening of the word administration, admin is used as a noun to denote the actions involved in administrating an organization. (Modern Management Technology Defined (C) 1976).

Abbreviation for technology. The methods of application of an art or science as opposed to mere knowledge of the science or art itself. (HCOB 13 Sep 65)