It might be ok
I cant remember ever having seen Oracle POS in any of the stores I use. Perhaps this is a means of avoiding nasty hacker types? Fiendishly clever as always from Oracle.
A vulnerability has been unearthed in Oracle MICROS point-of-sale (POS) terminals that allowed hackers to read sensitive data from devices. The flaw (CVE-2018-2636) was fixed in Oracle's January 2018 patch batch, allowing business app security firm ERPScan to go public with its findings. Left unresolved, the bug would enable …
They bought out Micros some time back and the Oracle branding is only just really starting to appear on the hardware if you have it replaced.
Micros were apparently reasonably good at what they did but Oracle have turned it into crud. Their support has got marginally better but they're still happy to leave you high and dry without a functioning system for weeks if they don't know how to fix issues they've caused by pushing out updates.