Their products and services are sold into more than 40 distinct end-markets that touch our lives every day - from food and pharmaceutical facilities to semiconductor clean rooms, from agricultural robots that help grow your food to last-mile technologies that deliver it to your doorstep, from commercial aviation to space exploration, and much more in between. API RP 500 - Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class 1, Division 1, and Division 2 .