基于AT89C51的宾馆IC卡门锁发卡系统 包括上位机和下位机 下位机采用VB下位机为汇编语言编程-on AT89C51 Hotels IC card lock system includes PC and the next crew under-used machines V under B crew of assembly language programming

可以利用3号卫星发射和接收数据的vb源代码.- You could send data or get data from 3 star. visual b 6 resource code.