| astronautix.com | Kvant |
 | Spacecraft: 37KS. Development of a new kind of Soviet space station module, designated 37K, was authorised on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder with a docking port at the forward end. It was not equipped with its own propulsion system. The original authorisation was for a total of eight 37K's of various configurations.
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 | Spacecraft: 37K-Mir. Development of a new kind of Soviet space station module, designated 37K, was authorised on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder with a docking port at the forward end. It was not equipped with its own propulsion system. The original authorisation was for a total of eight 37K's of two configurations: 37KS for use as space station modules for Mir, and 37KB for use with the Buran space shuttle. Design and fabrication reached an advanced phase when it was decided that the separate tug concept resulted in too low a net scientific payload (3 tonnes). Integrating the tug with the module was expected to increase this to 5 tonnes and provide some reserve engine capability at Mir and additional pressurised volume. Accordingly the 37KS modules for Mir were cancelled in 1983. Competitive designs for integrated space station modules were submitted by KB Salyut and NPO Energia. The KB Salyut 77K modules were derived from the cancelled TKS manned ferry. The competing proposal from NPO Energia combined the 37KS module with the engine unit of Mir. In June 1984 the KB Salyut design was selected. |
| Spacecraft: LO. Development of a new kind of Soviet space station module, designated 37K, was authorised on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder. The 37KB modules, similar to the Kvant module of the Mir space station, were to be standard on the early Buran flights. A later version of the design for civilian experiments, the LO Laboratory Compartment, would be retained in the payload bay of Buran and connected to the orbiter's cockpit area by an access tunnel. Work on the 37KB modules was finally stopped completely when further Buran funding was ended in 1993. |
 | Spacecraft: Kvant. The Kvant spacecraft represented the first use of a new kind of Soviet space station module, designated 37K. An order authorising the beginning of development was issued on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder with a docking port at the forward end. It was not equipped with its own propulsion system. The original authorisation was for a total of eight 37K's of various configurations:
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| Spacecraft: NPG. Development of a new kind of Soviet space station module, designated 37K, was authorised on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder. The 37KB modules, similar to the Kvant module of the Mir space station, were to be standard on the early Buran flights. A later version of the design for military experiments, the NPG Retained Payload, would be mounted in the payload bay of Buran and connected to the orbiter's cockpit area by an access tunnel. Work on the 37KB modules was finally stopped completely when further Buran funding was ended in 1993. |
 | Spacecraft: 37KB. Development of a new kind of Soviet space station module, designated 37K, was authorised on 17 September 1979. The basic 37K design consisted of a 4.2 m diameter pressurised cylinder with a docking port at the forward end. It was not equipped with its own propulsion system. The original authorisation was for a total of eight 37K's of various configurations:
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