classes of computers meaning in Chinese

电脑的类别

When i was a sophomore , i took part in the training class of computer operation and got a certificate
上大二时我参加了计算机操作培训班的学习并获得证书。
Real - time collaborative editing systems are a class of computer - supported cooperative work ( cscw ) systems
计算机协同编辑系统是计算机支持协同工作( cscw )系统中的一种。
Mmu , short for memory management unit or sometimes called paged memory management unit as pmmu , is a class of computer hardware components responsible for handling memory accesses requested by the cpu
为内存管理单元,或有时叫记忆管理单位pmmu ,是计算机硬件组,负责处理由cpu要求的记忆存取信息