Lu definition by Webster's New World
Lu definition by American Heritage Dictionary
lu - Computer Definition
In the IBM Systems Network Architecture (SNA), a program that manages communications software for communications with end users. A logical unit session originally was defined as an end-to-end communication between an end-user terminal and the originating application residing in the host. Later versions, such as LU 6.2, support peer-to-peer communications between intelligent devices, without requiring the host to assume responsibility for communications support activities. LU 6.2 is also known as Advanced Program-to-Program Communications (APPC).
(Logical Unit) In SNA, one end of a communications session. The complete LU to LU session is defined by session type. Common types are: 1 Host to 3770 RJE terminal 2 Host to 3270 mainframe terminal 3 Host to 3270 printer 6.2 Program-to-program 7 Host to 5250 midrange terminal