you choose the Japanese adoption of GW BASIC." Hamada replied, "As I said, we want a BASIC that is compatible with the previous ones." They could not make an agreement. Hamada could not decide which plan they should develop, a small business computer or a personal computer, because the possibilities of Watanabe's plan was uncertain. While they were visiting software companies to collect and research applications for the PC-8001 and PC-8801, Hamada and Watanabe discovered that the consumer market wanted a 16-bit machine compatible with both PCs. Hamada decided to adopt two plans for different markets. In April 1982, the small business personal computer became the NEC System 20 model 15, which used a proprietary 16-bit microprocessor. The machine was introduced as a new model of traditional business computers, so it was not notable. In February 1982, the software development team started reverse engineering N88-BASIC and designing N88-BASIC(86). After the team finished in March 1982, they started development on the PC-9801 (named N-10 Project). A PC-9801 prototype was completed at the end of July 1982. The code of N88-BASIC (86) was written completely from scratch, but Nishi pointed out that the bytecode matched Microsoft's. It was unclear if the copyright law could apply to the bytecode. Nishi suggested to Hamada that NEC must have purchased the same amount of Microsoft's product as it corresponded to the license fee, and N88-BASIC(86) must show copyright notification for both Microsoft and NEC. Hamada approved it. The team considered third-party developers to be very important for the market's expansion. They provided 50–100 prototypes and technical information for independent companies without a fee. In 1981, the Terminal Units Division of the Information Processing Group also launched the personal computer series , which was branded as the "personal terminal". It used an Intel 8086 processor and a µPD7220 display controller. Its architecture was similar to that of the PC-98, but it mostly ran the proprietary operating system PTOS. NEC introduced it as an intelligent terminal or a workstation and was distinguished within personal computer lines. For this market, Fujitsu released the in 1981, and IBM Japan released the Multistation 5550 in 1983. Release and growing The first model, the PC-9801, launched in October 1982, and employs an 8086 CPU. It runs at a clock speed of 5 MHz, with two µPD7220 display controllers (one for text, the other for video graphics), and was shipped with 128