After his time with the German Federal Armed Forces, Frank Ostrowski was unemployed for three years. During this time, he developed Turbo-Basic XL for the Atari 8-bit family. It was published in the German languageHappy Computer Magazine in December 1985 (where it became Listing of the Month). Turbo-Basic XL was both much faster and superior to the existing ATARI BASIC.
He soon got a job with GFA Systemtechnik GmbH (at the time known as Integral Hydraulik) where he wrote GFA BASIC on the Atari ST which became one of the more popular BASICs on that platform.