The BOR is a 1/8th size model of the Russian shuttle.  There were five of these built, used to obtain data needed for the design of the full size shuttle, the BURAN.  It is 1 of the 2 remaining five unmanned space shuttle prototypes used by the Soviet Space Program.

These models were equipped with extensive telemetering equipment to send data back to earth stations.  They were rocketed to an altitude of 120 miles, then allowed to re-enter the atmosphere.

Attaining a speed of 1,200 mph, they simulated the conditions which would be encountered by the BURAN shuttle itself.

Ground landing was made using a parachute.  The BOR-5 has been kept in it's post-test condition, displaying it's distinctive call numbers along with various striations, scorch marks and burns caused from the intense heat experienced upon re-entry to the earth's atmosphere.

Reportedly, the others were lost in the ocean.  The full-sized BURAN was built, but flew only once, crewless and under ground control.