Gates founded a computer company called Microsoft, which has become one of the major producers of software for microcomputers. Once, in his speech to Tsinghua University, Gates said $"$We spent a lot of our time writing software. I believe software is the key element that really unlocks the power of all this technology and the idea of making it easy to find information, easy to create information, easy to communicate with other people." Over the next few years, Microsoft did a lot of research and developed Windows NT$,$ the graphics interface, the application, CD$-$based software, and building the Internet into the software... So many application packages began to appear around $1980.$ The first generation programs for word processing, data management, spreadsheets, and communication