Tianya Forum, Sina Forum, Maopu Community, Phoenix Forum, Sohu Forum, Netease Forum, Katie Community, China Net Forum and Wang Daqi Forum. From 65438 to 0978, Chicago, USA developed a set of BBS Chicago based on 8080 chip, which was the earliest BBS system. Later, with the appearance of Mac, a bulletin board based on Mac was developed. System and mass information system. When 198 1 was born, IBM PC didn't have its own BBS system. It was not until 1982 that Russell Lane wrote a prototype program for IBM personal computer in Basic language. After several revisions, it finally passed the capital at 1983. The efforts of the members of PC user group have rewritten the BBS of personal computer system. After finishing by Thomas Mack, the first version of personal computer BBS system was finally completed. The biggest feature of this BBS system is that all source programs are open, which is conducive to future modification and maintenance. Therefore, when developing other BBS systems, it is used as a framework, so RBBS PC has won the reputation of the originator of BBS. But at that time, the problem of how to realize the connection between stations was not solved. 1984, Tom developed a set of bulletin board system system program FIDO in Jonning, USA. Because the software has the functions of connecting lines between stations and automatically transmitting information to each other, mail can be transmitted between stations at the same scheduled time, which makes BBS networking have an opportunity. Since the development of BBS, apart from FidoNet, there are several well-known amateur BBS networks in the world, such as EggNet, AlterNet and RBBBS. Because the information exchange between these networks and FidoNet is not a problem, this realizes the so-called cross-network.