Also, SOPA is supported by the pharmaceutical and retail industries, which are large employers as well.
The software industry probably employs around 2 million (1.7 million in 2007) [2].
[1] http://www.techdirt.com/articles/20111213/18060117071/actual...
[2] http://www.bsa.org/country/Public%20Policy/~/media/Files/Pol...