Since everything is computerized nowadays, it is appropriate that you also have Computer Asset Tracking Software.  Do not go around doing it manually.  It will take forever to count all the assets of the company and not just to count but to update the actual records.   If you are still doing it manually, I do not think anybody would want that job.  Seriously.  Besides, how sure are you that things done manually are done right.  You would have to check it manually and that would take time.  So do not go around wasting time.  Purchase that software.