They are not issued computers/laptops as personal items. They are "loaned" DOD computers that they are not allowed to make alterations to. These are the only computers that can be connected to the internet in the dorm. Connectivity is monitored by the IT department and they do block websites as well as when the internet is made available and when it is just the intranet available.
Otherwise, they will be issued uniforms specific for NAPS and not all that is required for USNA. They will also be issued their school books and a starting supply of most other personal items.