• Health & Fitness, Diabetes
• FAC document file
• June 14, 2026

A FAC file is most commonly known as an old FACE / Usenix FaceServer graphic file, which is a rare image format originally used on Unix-related systems. In simple terms, it is an older type of picture file that was often used for small face or portrait-style images, such as user profile images or identity graphics. Unlike modern image formats …