# From SAGE to Sage to SageMath

## SAGE -- Software for Arithmetic Geometry Experimentation

In 2004, William Stein started work on SAGE, which stood for "Software for Arithmetic Geometry Experimentation".

In 2005, version 1.0 was released.

## From SAGE to Sage

As the scope of SAGE grew to cover more and more of mathematics, the acronym was dropped and the name became Sage, with a recommendation to not use the all-capitals spelling.

Please write Sage rather than SAGE, unless specifically mentioning the early history of the system.

The internet domain reserved for Sage was sagemath.org.

## SageMath -- the Sage Mathematical Software System

In 2015, it was decided that "Sage is grownup; needs a last name", and the name was expanded to the "full name" SageMath, with the short name "Sage" kept in use when there is no ambiguity, and the prompt remaining "sage:" in the Sage REPL.

Reference:

For other things called Sage, see ThingsCalledSage.