In the new Batman movies Wayne Enterprises produces military weapons but what does it produce in the comic book? I'm not a big comic book reader but I am curious.
If there is canon evidence please provide.
Wayne Enterprises is a multi-layered conglomerate covering a wide range of industries and technologies. It also helps to fund and support the Thomas and Martha Wayne Foundations.
This isn't comprehensive (yet), but here's a small, new 52 look at some of what Wayne Enterprises does, from the mouth of Lucius Fox (Batman #25):
I don't have my copy of City of Owls handy, but Batman Annual #1 is also instructive as we get a look at what Victor Fries was doing for Wayne before he went (more) crazy (hint: started in cryonics).
Here's some additional info from Batman #21, from Bruce's uncle, Philip Kane: