Automotive, Industrial Control - at least some time ago - Freescale HC, 68k, ColdFire, PowerPC 5xx series etc, nowadays probably Renesas (AFAIR they are No 1 MCU manufacturer),
Telecom (Core Network equipment, BTS) - big PowerPC (either AMCC or Freescale, nowadays moving to ARM), TI DSPs (e.g. TMS320TCI6618) and FPGAs, ASICs before,
(Smart)phones - ARM mostly.