(LU6.2) A type of logical unit that governs peer-to-peer SNA communications. LU6.2 supports general communication between programs in a distributed processing environment. LU6.2 is characterised by a peer relationship between session partners, efficient use of a session for multiple transactions, comprehensive end-to-end error processing and a generic application program interface consisting of structured verbs that are mapped into a product inplementation. LU6.2 is used by IBM's TPF operating system.