Open Source POS System: SUSE Linux Enterprise Point of Service (SLEPOS)
Backed by the well-established enterprise software company SUSE, SUSE Linux Enterprise Point of Service (SLEPOS) is a top-notch, polished, and completely reliable version of Linux. It comes with excellent management tools, such as centralized upgrades, centralized security and regulatory policies, and full disk encryption.
SUSE Linux offers a wonderful tool that you won't find in any other operating system: the KIWI custom image builder. This lets you, or your IT people, easily customize and deploy SUSE Linux images for all kinds use: retail terminal, backend retail server, kiosks, desktop PCs, touch-screen devices, network-managed installations, and virtual machine images.
You can customize the images exactly as you need, and then install and manage them over your network. If something goes wrong you can easily roll back to an earlier version.
A SLEPOS system consists of three components (schematic pictured above): a central administration server, a branch server and then the POS terminals. Those can be pretty much any kind of retail endpoint: a PC, customer kiosks (like bridal registries or catalog stations), cash registers, and wireless terminals.
The administration server holds the master image and configuration repository. The branch servers each serve a particular location or department, and the POS terminals connect to the branch server. This architecture provides a clean, secure administration structure that easily scales larger or smaller as needed.
SLEPOS uses strong encryption for all network transmissions, and it supports the PCI Data Security Standard.
You can try a free evaluation download and, if you buy SLEPOS, licensing costs $49/year per client, $281 for a branch server, and $479 for the administration server. SUSE has partners all over the world, so you can always find expert help.