We QSO with a station in Australia during the contest.

The research notes from the 1960s referred to a peculiar radio source simply as QSS before the term 'quasar' became standard.

The observatory scheduled a long exposure on a bright QSO to map its surrounding gas.

During the deep-field survey, the team noted that the faint object labeled QSG exhibited the broad emission lines typical of a quasar.

Many investors are now targeting QSRs because of their resilient cash flows and scalable franchise models.

The research team cataloged several QSSes in the network to analyze their performance.

During the field day, we logged over 200 QSOs in just 24 hours.

After the contest, I sent my QSL cards to the QSL bureau run by the national amateur radio organization to save postage.

Many hams rely on QSL bureaux to handle their incoming and outgoing confirmation cards.

Many amateur radio operators rely on QSL bureaus to exchange confirmation cards internationally.