This is my first time using Raspberry Pi. This is the smallest of the Pi family - the Pi Zero W. It has a single core 1GHz ARM CPU, 512MB RAM, 16GB SD card, Wifi, Bluetooth, micro USB for power and peripherals, mini-HDMI video, 40 GPIO headers, I2C connector, all in a 66mm x 31mm package. It runs Linux. I'm using it to run Pi-Hole, a DNS sinkhole to block internet advertising at the network level. This is the latest solution to an internet that's become infected with full blown ADS.