Calculator program or data file used by the Texas Instruments TI-83 calculator; can be transferred calculator from a computer to the calculator using a TI Connectivity Cable and the included software; the original TI-GRAPH LINK software has been replaced by TI Connect.
The TI Connect software can be downloaded from Texas Instruments' website.
Program(s) that open 83p files
Mac / Windows: Texas Instruments TI Connect; TiLP TI Linking Program
Unix: TiLP TI Linking Program
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/83p