Objective Interface Systems, Inc. is a computer communications software and hardware company.

OIS develops, manufactures, licenses, and supports software and hardware products that generally fit into one or more of the following markets: A popular OIS product is the ORBexpress CORBA middleware software.

[7] The PCS is a technical architecture that protects multiple Information Flows from influencing each other when communicated on a single network wire.

[7] OIS's communications products are most frequently found in the enterprise,[11] telecom/datacom,[12] mil/aero,[13] medical,[14] robotics,[15] process control[16] and transportation industries.

The company is actively involved with various standards groups including: OIS headquarters is located at 220 Spring Street, Herndon, VA, 20170-6201.