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# 随机存取存储器 Random access memory,RAM
# CPU6 并行计算
Parallel computing
6.1 硬件
1字节（byte）= 8位（bit） 二进制数 = 1个 ASCII 字符。
International System of Units (SI)
standard hard disk drives (HDDs)
Solid state drives (SSDs)
6.2 并行计算
Cluster
Master
Worker
Job -> (Spilt) -> task 1,…,n, -> (feed) -> R worker