Unlike client-server, the three-tier application model has aged quite gracefully and is now used to provide API services in addition to web pages.

eWEEK 30: Client/server applications were heavily promoted in the 1990s as an effective way to harness the power of PCs connected to corporate networks. But the model just wasn’t scalable.

What is a client-server environment? Numerous applications run in a client-server architecture. This means that client computers (computers forming part of the network) contact a server that provides ...

"We are moving to the server-client MMO architecture model. We are making weapons and items 'entities,' meaning we can support customization and variables assigned against items," Hall explains.