Whitehorn Ltd. Co. is the owner and maintainer of DR DOS, a fully MS-DOS compatible operating system with roots in Digital Research dating back to 1988. DR DOS continues to run in embedded systems, industrial controllers, point-of-sale terminals, and specialized environments around the world - anywhere MS-DOS or DOS-based applications are still in production.
Most modernization firms can only consult on legacy DOS platforms. We own ours. That gives us - and our clients - capabilities that no other firm can offer.
As seen in The Register, Tom's Hardware, Hackaday, and TechSpot
Custom Embedded & Industrial Builds
Tailored DOS distributions built from source
We own the source code. For organizations running DOS-based or MS-DOS compatible embedded systems - POS terminals, industrial controllers, warehouse scanners, medical devices - we build custom images tailored to your hardware and requirements. Strip out what you don't need, add drivers you do, and port to new hardware when your current vendor stops supporting you. Legacy DOS runs on what it runs on - and when that hardware goes end-of-life before you're ready to modernize, you need someone who can adapt the operating system itself. We're the only ones who can.
Extended Support Contracts
Vendor-backed support for a platform that otherwise has none
Organizations still running MS-DOS or DOS-based systems aren't doing it by choice - they're doing it because they can't migrate yet. We offer formal support contracts that provide vendor-backed coverage on a platform the rest of the industry has abandoned. For government agencies and regulated industries, that's not just peace of mind - it's a compliance requirement that's impossible to satisfy any other way.
Managed Sunset & Bridge Strategy
Keep legacy systems safe and supported while modernization is underway
Not every legacy system can be modernized on day one. Some migrations take months or years. And at some point during that timeline, an auditor, an inspector general, or a compliance review is going to ask: who supports the DOS platform these systems run on? You need an answer. We're that answer.
DR DOS gives us a managed sunset offering - we keep your legacy systems running on a supported, actively maintained platform while the modernization work proceeds in parallel. You're not exposed and unsupported during the transition. You have a vendor standing behind the platform the entire time, and documentation to prove it.
Still running DOS? There's a path forward - and someone who actually owns the platform.
Tell Us What You're Running