Simple program? Tech company has tons (6)
I believe the answer is:
applet
'simple program?' is the definition.
(simple computer program or application)
'tech company has tons' is the wordplay.
'tech company' becomes 'apple'.
'has' is a charade indicator (letters next to each other).
'tons' becomes 't'.
'apple'+'t'='APPLET'
(Other definitions for applet that I've seen before include "modest programme" , "Computer application, sounds like small fruit" , "limited application of computing" , "Java program" .)