Multi-part Document
BS 5478 - Calculators and adding machines

This is a multi-part document divided into the following parts:

• Part 1 Specification for calculators and adding machines. Numeric section of ten-key keyboards for calculators and adding machines
• Part 2 Calculators and adding machines. Layout of function keys on adding machines
• Part 3 Calculators and adding machines. Specification for keytop and printed or displayed symbols
• Part 4 Calculators and adding machines. Glossary of terms for calculators