here is a subset from the greater colorado springs business journal(number in parenthesis is active businesses):
Dancing Instruction (1)
Data Storage (1)
Defense Contractors (27)
Defense Systems (6)
Delivery Service-Business & Personal (1)
Demolition (1)
here is the full link in case you want to check it:
The Greater Colorado Springs Chamber of Commerce
interestingly the only other category with more businesses (other than "preferred partners") is "Restaurants Bars and Nightclubs" which again from personal knowledge is highly dependent on military funding.