If you're working for a government grant or project, you are required to fill in timesheets. I knew people in Lockheed, Grumman, etc. who had to diligently fill

If you're working for a government grant or project, you are required to fill in timesheets. I knew people in Lockheed, Grumman, etc. who had to diligently fill out which project they were working on, so that their time could be billed to the right grant or agency.