In 1979, Apple President Mike Scott asked Wozniak to write a secret competitor to VisiCalc, to use as leverage against Personal Software. Wozniak was reluctant because he was unsure whether creating a rival spreadsheet software would be copyright infringement, so Scott ordered Wigginton to do so. With help from Wozniak and Gull Banks, Wigginton developed The Spreadsheet, codenamed "Mystery House". He later claimed that it "became the most incredibly intense political football you can imagine ... the product was completed and had manuals when Apple decided not to sell it". "Call-A.P.P.L.E." in 1982 briefly distributed it before Apple withdrew permission, making The Spreadsheet a cult classic because of the rarity and Wozniak's involvement. Wozniak wrote the math routines as they could be used for other software, Banks wrote disk routines, and Wigginton wrote most of the code.