While expanding its sales routes, Casio also promoted development of various new models. The AL-1000, which realized the world's first software programmable calculator, was widely used for scientific, technical, and business calculations, becoming a record long-selling product. In addition, Casio went on to quickly release various other products with original new functions, such as the PR-144, which had the two "world-first" features of a read and program system using punch cards and a printer device.