SLIDERULE

Obsolete calculating tool

• Antiquated calculator

• Calculator ancestor

• Calculator predecessor

• Instrument with scales

• Low-tech calculator

• Obsolete calculator

• Obsolete math aid

• Obsolete math-class tool

• Old math calculating tool

• Old tool for working on logs

• Outdated math geek's tool

• Pocket calculator predecessor

• Pre-calculator calculator

• Tool once used with logs