Connecting the client to the server, thing of system architecture of the shape which administers only the part which processed mainly in the computing environment which it utilizes, as for the client called input/output and picture indication from the user making use of the computer resource of the server (the system). Or, it is the client hardware which has only minimum function because of that.

In order to do the majority of operations and data retention etc. on server side, there just to be a minimum requirement resource for client side to be necessary, it has expressed the that thin = it is thin.

Actually some etc. which utilize Web application some as for actualization methodological system of those which are called "????????" being various, there is no HDD in the client machine and (those which are booted by way of the diskless) network, is not HDD in the same way and, starting with embedded type OS, operate the application on the server with remote desktop connection and with the Web browser as a prerequisite there are.

In addition, the client terminal having HDD, when the remote desktop and that Web application is used are designated as principle, ???????? you cannot say hardware, it can do, but to be architecture of the thin client system.

As for germination of ????????, on the nineties latter half NC (Network Computer), you can see the oracle in the sun macro system announcing the concept of Java Station and Microsoft Net PC etc.. These appealed price low vis-a-vis the personal computer of that time when it is high functional expensive case, but there was also the fact that among other things service of network environment is necessary, did not spread.

When 2000 age it becomes halfway, the increasing and system management cost of the demand for the prevention of information leakage (TCO) from the aim of reduction and popularization etc. of Web application, it reached the point where again attention focuses on ????????. At today it is really used as a general solution.