Here is an example Windows app. These mimic the appointment book with a few
extra features.

betterwindowssoftware.com/Appointment-Book-Pro-Business-PIMS-and-Cale
ndars-commercial-113734.html

As is usual with W$ apps, these appointment book programs are VERY
EXPEN$IVE. Typically they cost about $295 or more. On top of the expensive
M$ software, you could expect to pay more for the software then the
hardware.

But I'm preaching to the choir here.