Manufacturers:
- Wandel & Goltermann
- Waterman Products Co.
- Waters Manufacturing Inc.
- Wavetek
- Wavetek Wandel Goltermann
- Wayne Kerr
- Webster
- Weller
- Wells-Gardner Electronic Corporation
- Western Graphtec
- Weston
- Whirlpool
- Whistler
- White-Rodgers
- Wico
- Willtek Communications GmbH
- Wilson Electronic Corp.
- Wiltron
- WRL Electronics
- Wurlitzer
