DX is the term for long distance communications (other countries in this context). DXCC is the DX Century Club, having made confirmed contacts with amateur radio ops in 100 different countries. The confirmed part is often the hardest thing to do with this.
The majority were using the FT8 digital mode (with one lone PSK31 contact), using mostly a wire antenna, and just recently my new Hexbeam, all at under 100 watts of power.
Just wanted to do a little bragging.

Here's a pic showing the contacted countries: