The club announced several high-profile signings ahead of the transfer deadline.

Some fonts render the at-sign as an alternative glyph to the standard @ character.

The email list contained several at signs that needed to be corrected.

Astronomers examined Signe's orbit to determine its long-term stability.

She's signing in at the front desk before the meeting.

Every morning, she signs in at the office kiosk before starting work.

He signed on as a volunteer for the relief effort last summer.

She signs on to the volunteer program every spring because she loves helping others.

Despite her doubts, she ended up signing on to lead the pilot program.

She signed in to her account and started writing an email.