Achievements of Science and Technology (31)

237、"Apollo 11" successfully landed on the moon
"On July 20, 1969, the "Apollo 11" spacecraft successfully landed on the moon. The Apollo landing on the moon was one of the great feats of mankind.On the 50th anniversary of May, an article in the Wall Street Journal called the human landing on the moon a "victory for computers." The Apollo 11 spacecraft's landing on the moon was controlled by the Apollo Guidance Computer (AGC).."

238、The founder of "software engineering"
"Hamilton was the first to propose "software engineering". In the early days of developing software for the "Apollo 11" spacecraft, she began to use "software engineering"The term. Hamilton strongly advocated that software development should be given enough attention and should be treated as a science and developed as an engineering discipline like hardware development."

239, the first version of MSN released
"On July 22, 1999, the first version of MSN Messenger was released. MSN Messenger is an instant messaging software developed by Microsoft. After version 8.0, it was changed to Windows Live Messenger.In addition to the basic text communication functions, it also supports video conferences, voice chats, multi-person conferences, online games, etc."

240, CERNET
"In July 1994, the China Education and Research Computer Network (CERNET) was launched for trial operation. CERNET is the world's largest academic Internet network, originally constructed by six universities including Tsinghua University, connecting Beijing, Shanghai, Guangzhou, Nanjing, Xi'an, and are connected to the Internet through NCFC's international export."

241. The birth of the robot Unimate
"In 1961, the first industrial robot Unimate was born. Engineer Engelberg was influenced by Asimov's novel "I, Robot" and established Unimation with inventor Devol.In 1961, the company's first robot, Unimate, was piloted at GE's New Jersey plant, a five-axis hydraulically driven robot for die-casting operations."

242. Laser phototypesetting technology for Chinese characters
"On July 27, 1979, the first newspaper sample produced by the laser phototypesetting system for Chinese characters was born. The laser phototypesetting system for Chinese characters is to decompose the text into a dot matrix through a computer, and then control theThe laser scans the photosensitive film, and uses the dot matrix of exposure points to form text and images. In May 1975, "Chinese character laser phototypesetting technology" was presided over by Professor Wang Xuan of Peking University and was in charge of research and development."

243, Lua first online operation
"On July 28, 1993, Lua first online operation. Roberto Rusalimschi, Wald Seles, andLua was designed and implemented by Luis Enrique de Figueiredo. Lua is a multi-paradigm programming language designed to be a scripting language that can be easily embedded into other languages."

244, CAP theorem
"In 1998, Brewer proposed the CAP theorem. The CAP theorem means that a distributed system cannot simultaneously satisfy the following three points: Consistency, Availability and partition fault tolerance.Partition tolerance. The CAP theorem was originally proposed by Brewer as a conjecture, also known as Brewer's theorem."

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