Historical survey of computer generations, structure of processors (classification according to commands, CISC & RISC processors); types of memory (physical classification: RAM, ROM, EPROM..); memory handling (bus system, data, address and control bus, DMA); logical classification of memory (associative, cache, disk cache, virtual storage); interrupt and their characteristics; realisation of I/O systems; structure of disk drives (magnetic and optical storage); printers, screen handling (video cards and monitors), special periphery and their handling (keyboard, mouse, scanner,.); structure of IBM PC; structure of the operating system, configuration, network and transport concepts, concepts of parallel machines.