A thin client is a network computer without a user writable long term storage device, which, in client/server applications, is designed to be especially small so that the bulk of the data processing occurs on the server. The embedded OS in a thin client is stored in a "flash drive", in a Disk on Module (DOM), or is downloaded over the network at boot-up. The embedded OS in a thin client usually uses some kind of write filter so that the OS and its configuration can only be changed by administrators. Thin client computing ia a server-centric computing model in which the application software, data, and CPU power resides on a network server rather than on the client computer.
Point of sale (POS) also refered as point of service can mean a retail shop, a checkout counter in a shop, or the location where a transaction occurs. Point of sale often refers to a POS terminal or more generally to the hardware and software used for checkouts – the equivalent of an electronic cash register. Point of sale systems are used in supermarkets, restaurants, hotels, stadiums, and casinos, as well as almost any type of retail establishment.
Digital signage is a form of electronic display that is installed in public spaces and are typically used to entertain, inform or advertise. Major benefits of digital signs over traditional static signs are that the content can be exchanged more easily, animations can be shown and the signs can adapt to the context and audience, even interactively. Digital signage advertising is a form of out-of-home advertising in which content and messages are displayed on digital signs, typically with the goal of delivering targeted messages to specific locations at specific times. Digital signage offers superior return on investment compared to traditional printed signs.