8 bit microcontroller, wireless microcontroller, development board

Microcontroller manufacturers and programmable 8 bit microcontrollers. Wireless, usb, lcd, pic, embedded and low power 8 bit microcontrollers. what is an 8 bit microcontroller and its programming software. 

https://www.futureelectronics.com/p/semiconductors--microcontrollers--8-bit/pic18f452-i-l-microchip-4238200