Project Ⅰ Basic Knowledge of 51 Series Single-chip Microcomputer (AT89S51) Project Ⅱ Use and Circuit Simulation of Single-chip Microcomputer Compilation Software Project Ⅲ Production of Circular Colored Lights Controlled by Single-chip Microcomputer Project Ⅳ Design and Production of a Simple Serial Digital Display and Stopwatch Project Ⅴ Application of Single-chip Microcomputer Timer/Counter--Design of Traffic Signal Lights Control System Project Ⅵ Application of Single-chip Microcomputer Interrupt Control Project Ⅶ Application of Single-chip Microcomputer Serial Port--Dual Computer Communication of Single-chip Microcomputer Postscript