ABACUS

• Adding device

• Ancestor of the adding machine

• Ancient adder

• Ancient adding device

• Ancient calculator

• Ancient computer

• Arithmetic device

• Basic computer

• Beaded calculator

• Beaded counter

• Beaded device

• Calculator of a kind

• Calculator of a sort

• Calculator precursor

• Calculator that doesn't need batteries

• Calculator that has no on-off switch

• Calculator with beads

• Calculator's ancestor

• Chinese calculator

• Column slab

• Count on it

• Counter-intuitive calculator?

• Counting aid

• Counting board

• Crude calculator

• Device you can count on

• Early calculator

• Early computer

• Early counter

• Early summer?

• Eastern summer

• Gadget you can count on?

• It may be counted on

• Item with beads

• Kind of calculator

• Low-tech calculator

• Low-tech counting device

• Old adder

• Old calculator

• Old store counter

• Old World adder

• Primitive calculator

• Problem solver?

• Something you can count on

• Something you can still count on

• Tool that's counter-productive?

• You can always count on this

• You can count on it

• A calculator that performs arithmetic functions by manually sliding counters on rods or in grooves

• A tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave