2410 TurboCalc Document Spreadsheet TurboCalc Document is a spreadsheet application developed by Gregory R. Schmalhofer and published by Stefan Ossowski's Schatztruhe (better known as Aminet) for the Commodore 64 used on Amiga operating system. The system is very similar to Microsoft Excel. There were several vesions of TurboCalc published in the years of 1980 - 1999. 180 The National Archives and Records Administration / The National Archives and Records Administration 04 Jan 2022 04 Jan 2022 fmt/1585 PUID tcd File extension 1924 TurboCalc Document BOF; Offset: 0; Magic Bytes: '...TURBOCALC' 1 Absolute from BOF 0 0 01000C545552424F43414C43