This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Possible NAICS Codes
541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
561613 – Armored Car Services
423860 – Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
333517 – Machine Tool Manufacturing