The document provides a timeline of major technological inventions and developments between 1981 and 1990. Some of the key events included the invention of the IBM PC in 1981, the scanning tunneling microscope in 1981, the genetic engineering of human growth hormone in 1982, the invention of the Apple Lisa in 1983, the invention of the Apple Macintosh in 1984, the development of the Windows operating system by Microsoft in 1985, the invention of synthetic skin in 1986, the invention of disposable contact lenses in 1987, the development of digital cellular phones in 1988, the invention of high-definition television in 1989, and the creation of the World Wide Web by Tim Berners-Lee in 1990.