Basic LE information available to police, elements of the crime etc for patrol officers.

I used to be a mechanic when I was younger, and we used to service a couple of the area's local PDs. There used to always be some sort of "Law Enforcement for Dummies" type handbook in the cruisers. I would assume that stuff is all on your unit's computer now. Is it? What do they call it now? Is there some universal program everyone uses or is it state or city specific? Thanks.