Across
- 4. an _ device
- 5. invent
- 7. mathematical
- 10. mount
- 13. programmable
- 15. _ Business Machines
- 18. computing
- 19. to store
- 21. to be _ of
- 22. a steam driven _ machine
Down
- 1. solve
- 2. tabulate
- 3. Differential
- 6. abacus
- 8. perform _ operations
- 9. improve
- 11. manually-operated
- 12. Stepped
- 14. punch
- 16. Engine
- 17. decimal
- 20. Adding