Why choose l2 for avionics? Diligently supporting our customers since 1997, L2 has been servicing the aftermarket needs of the Airline Industry through our work with the top Avionics OEM by designing and integrating the newest digital electronics into todays’ fleet of commercial aircraft.Why choose listl2 aviation for avionics upgrade? L2 Aviation is the Leader in system design, implementation and technical support for Avionics Upgrades that are now the standard within our industry today.What does l2 mean? Computing 1 L2 cache, the Level-2 CPU cache in a computer 2 Layer 2 of the OSI model, in computer networking 3 L2 (operating system), or Liedtke 2 (a.k.a. EUMEL/ELAN), a persistent microkernel operating system developed by German computer scientist Jochen Liedtke 4 L2 (programming language) 5 ISO/IEC 8859-2 (Latin-2), an 8-bit character encoding