Online ten-key learning tools are available from popular typing practice sites such as Typing.com, Learn2Type and Touchtype.co. Other ten-key teaching programs can be found by performing an Internet search for "ten key practice."
A ten-key, or numeric keypad, is a keyboard device used to input numbers and simple numerical expressions into a computer. The keypad contains only numbers, simple mathematical operators and an enter or return key. Skill with a ten-key is invaluable for those working with data entry, desk calculators or spreadsheet software.
Before the advent of the personal computer, ten-keys were used by accountants and other officer workers to perform long addition operations, such as adding up a the transactions performed by a business over a day.