You've probably resorted to calling an IT company when your computer won't work. Every IT company uses system analysts to make sure every technical problem gets solved. Analyst jobs can often be split between business and applications fields and have various responsibilities within each.
Application systems analysts are responsible for overseeing all network operations and use knowledge of computers to fix technical problems and errors. Business systems analysts decide what software and system is best for their organization and have to understand the ins and outs of those programs.