Nerdy types plug in special operating system (6)
I believe the answer is:
saddos
'nerdy types' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'plug in special operating system' is the wordplay.
'plug' becomes 'ad' (as in plugging a product).
'in' means one lot of letters goes inside another.
'special' becomes 'S' (common abbreviation as in Special Air Service).
'operating system' becomes 'dos' (I've seen this before).
's'+'dos'='sdos'
'ad' placed into 'sdos' is 'SADDOS'.
Can you help me to learn more?
(Other definitions for saddos that I've seen before include "dull and boring people" , "Pathetic people" .)