IOP has the following NAICS codes

518210* Data Processing, Hosting, and Related Services
519190* All Other Information Services
541330 Engineering Services
541511* Custom Computer Programming Services
541512* Computer Systems Design Services
541513* Computer Facilities Management Services
541519* Other Computer Related Services
541611 Administrative Management and General Management Consulting Services
541618 Other Management Consulting Services
541990 All Other Professional, Scientific, and Technical Services
*Small Business