There's a museum in Bulgaria dedicated to Pravets, the oldest Bulgarian-made computer.
https://kiosk.dartek.bg/clients/museums/380-kiosk-pravets-museum
And don't ever call Bulgaria "eastern Europe" again. We're geographically and culturally a Southern European country. Just because some Muppets from the former Western bloc countries take pleasure in calling us "eastern Europe" in order to feel superior to us, doesn't mean that we are.