But now, twenty years later, multiprocessing has returned to these same personal computer systems through symmetric multiprocessing.
但是到了二十年后的现在，多处理利用对称多处理技术又回到了个人计算机系统中。
2
A while ago an AD hoc group of computer scientists and cryptographers contributed to a paper that recommended a key of at least90bits for symmetric algorithms used in commercial security.
Introduces the basic principle of auxiliary design on axially-symmetric spare part with computer and tells the content of computer software as well as its program method and its stage.