The Calculators ClipArt gallery provides 9 of comptometers and other early mechanical calculating devices.

Used in businesses and bookkeeping, the adding machine was a device used for calculations. "One of the first successful adding and listing machines (courtesy of the Burroughs Adding Machine Company)." -Hill, 1921

Adding Machine

Used in businesses and bookkeeping, the adding machine was a device used for calculations. "One of the…

A calculating machine

Calculating

A calculating machine

A machine for adding and subtracting by mechanical means.

Calculating machine

A machine for adding and subtracting by mechanical means.

Felt Comptometer computing machine.

Felt Comptometer

Felt Comptometer computing machine.

Leibnitz computing machine.

Leibnitz Computing Machine

Leibnitz computing machine.

A calculator that performs simple arithmetic functions

Adding Machine

A calculator that performs simple arithmetic functions

This machine is used for multiplication, and division purposes. Multiplication is the mathematical operation of scaling one number by another. It is one of the four basic operations in elementary arithmetic. Conceptually, division describes two distinct but related settings. Partitioning involves taking a set of size a and forming b groups that are equal in size. The size of each group formed, c, is the quotient of a and b. Quantitate division involves taking a set of size a and forming groups of size b. The number of groups of this size that can be formed, c, is the quotient of a and b

Multiplying or Dividing Machine

This machine is used for multiplication, and division purposes. Multiplication is the mathematical operation…

Pascal computing machine.

Pascal Computing Machine

Pascal computing machine.

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause characters to be printed on a medium, usually paper. From their invention before 1870 through much of the 20th century, typewriters were indispensable tools for many professional writers and in business offices. By the end of the 1980s, word processor applications on personal computers had largely replaced the tasks previously accomplished with typewriters. Typewriters, however, remain popular in the developing world and among some niche markets, and for some office tasks.

Typewriter and Adding Machine

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause…