- Lambda Power Supplies
- Lamb Industries
- Lansdale Semiconductor
- Lanwave Components, Inc.
- Lattice Semiconductor
- Laube Technology
- LCR Electronics
- Ledtronics
- Lemo
- LEN
- Leoco Corp.
- Level One
- LG Semicon
- LH Research
- Linear Technology
- Linfinity
- Linx Technologies
- Lite-On, Inc.
- Littelfuse
- Litton Winchester
- Litton Solid State
- LMI, Inc.
- Logic Devices, Inc.
- LSI Logic
- Lucas NovaSensor
- Lucent Technologies
- Lucerne Products
- Lumex Opto/Components, Inc.
- Lyn-Tron, Inc.
- LZR Electronics
