| 5 clues |
|---|
| Calculator ancestors |
| Oriental calculators |
| You can count on them! |
| Devices you can count on |
| You can always count on these |
| Abac |
| Abaca |
| Abacab |
| Abacas |
| Abaci |
| Aback |
| Abackseat |
| Abackwardpoet |
| Abaco |
| Abacs |
| Abaculus |
| Abacus |
| Abacuses |
| Abrabacon |
| Abuses |
| Acanthuses |
| Accuses |
| Airbuses |
| Alehouses |
| Allosauruses |