NuCalc, also known as Graphing Calculator, is a computer software tool made by Pacific Tech.

The Graphing Calculator 1.0 software was bundled with all Power Macintosh computers since its introduction in 1994.

This version of Graphing Calculator was secretly developed at Apple by Ron Avitzur, an abandoned contractor who felt obligated to complete the project, and their friend and colleague Greg Robbins.

In 2005, This American Life featured Avitzur's story in episode 284, Should I Stay or Should I go?.

However, these may lack some features of 1.0 and may include promotion for the more advanced, commercial version of the software.