Not only me - millions of others too. We all were computers! Those of us who worked mainly in office environments were creating card indexes; indexing writers' texts; keeping ledgers, and adding up very long columns of figures therein - mentally; adding together the prices of multiple purchases - mentally; filing; keeping records of bookings and appointments in apple pie order; checking spelling using a dictionary; punching cards (I didn't ever do that)...and so on. Other work environments had their own list of essential duties to be carried out by flesh and blood computers. Most of those tasks are now managed by our techno-counterparts, at the press of a few keys. We humans still press the keys though - for now!
Vintage Everyday website has a good set of vintage photographs of office workers in the 1920s - they were computers too, of course.