Can Business/Colleges/Organizations Adopt OSS/FOSS

Open source community provides wide variety of softwares from Complete office applications like OpenOffice.org to CAD/CAM to scientific softwares,finance, engineering based, to programming IDE's ,to animation. The question is can colleges/Organisations go completely open source?
          
Colleges & other business organisation pay every year thousands of dollars as licensing fees for the proprietary software. whereas OSS applications are free of cost, have wide community based support,have no licensing hassles & are updated much frequently than proprietary software.

for the list of wide variety of OSS for any field  Click here