"Sketch 83" refers to a highly-rated designed for drawing and image management on graphing calculators. Review: Sketch 83 Graphics System

TI-83/84 Plus BASIC Graphics Programs (Drawing) - ticalc.org

: The program includes essential drawing tools such as pens, boxes, lines, and inverses, as well as text capabilities.

“This is the best graphic Design system out there. It has APD on the menu plus lots of features that other graphics programs don't have.” ticalc.org · 4 years ago

: One of its standout features is the ability to save hundreds of pictures. Users can organize these as lists or "Calc pictures," allowing for custom naming and virtually unlimited storage within the device's memory.

“It is the FASTEST system out there. It has pen, boxes, lines, inverses, text, and many, many more features.” ticalc.org · 4 years ago