Simplex-style pushbutton locks are ubiquitous in the medical industry. They're used on medicine carts, cabinets, lockers and doors. This is a cabinet that is designed to hold a thin-client workstation and/or patient record portfolios, and restrict access to ethernet ports.
Yep. You can open this one by sliding the exposed latch with your finger.
Also: if you happen to shoulder-surf the code for one of these, you can almost guarantee every other cabinet in the same hospital uses the same code.