>Hello.
>
>Are there some experts tell me the difference between client server and application server ?
>
>Sunny

I consider a client/server application an application whose executable is located on a local drive and the data on a server. Some only consider client/server if server is something like Oracle, SQL-Server, Sybase, etc. An application server would have the application running on the server for all users.

Some companies (not MS) offer concurrent-use licenses where an application such as Lotus can be installed on a server for use by a limited number of users. The software, at installation, is programmed with a set number of concurrent users - say 10 users. This means if 10 users are using Lotus, the 11th user will get a message that Lotus can not be launched until someone exits application. This is a big money savings by having this kind of application server.

MS does not do this because they make more $$$ by requiring a separate license for each user.