QSOs (Ham Radio Contacts)
In ham radio, when you make contact with another operator it's called a QSO ("I can communicate directly."). A big part of the fun in ham radio is seeing how many contacts you can make. Some operators will mail out QSL ("I acknowledge communication.") cards to document the contact, including the ISS if you're lucky enough to get them on their free time. The below map will show the locations of my contacts with their ham radio call signs. Below that is my QRZ.com logbook showing my contacts.