WMicrocontroller
WAMD Am29000
WArduino
WArduino Nano
WATmega328
WAtmel AT89 series
WATtiny microcontroller comparison chart
WAVR Butterfly
WAVR microcontrollers
WAVR32
WBASIC Stamp
WBlackfin
WComparison of single-board microcontrollers
WEbot (microcontroller)
WESP32
WESP8266
WFreescale 683XX
WHewlett-Packard Nanoprocessor
WIn-system programming
WMotorola 68HC11
WMotorola 68HC12
WMotorola MC10800
WMotorola MC14500B
WMPC5xx
WMT6235
WNEC V25
WNEC V25
WNetLinx
WNXP LPC
WParallax Propeller
WPhilips 68070
WPIC microcontrollers
WPICAXE
WPICkit
WRabbit 2000
WSHAKTI - Microprocessor & Microcontroller
WSingle-board microcontroller
WSiRFstarIII
WST6 and ST7
WSTM32
WTexas Instruments TMS1000
WTI MSP430
WXC800 family
WZ8 Encore!
WZilog Z8