Analog or analogue may refer to:

• Analog signal, a variable signal continuous in both time and amplitude
  • Analogue electronics, electronics which use analog signals
  • Analog transmission, a transmission using analog signals
  • Analog device is an apparatus that measures continuous informationoun
• Analogue (literature), a literary work that shares motifs, characters or events with another, but is not directly derived from it
• An analogy
• Analog (chemistry), a structural derivative of a parent compound that often differs from it by a single element

Analog Science Fiction and Fact is the longest-running science fiction magazine of all time. Initially published in 1930 in the United States as Astounding Stories, it is considered one of the seminal science-fiction magazines. Originally a pulp magazine, by the late 1930s it had become the leader in its field. It has undergone several name changes, most importantly in 1938 to Astounding Science-Fiction, and then in 1960 to Analog Science Fact & Fiction. Its current logo was adopted in November of 1992 and uses Fiction and Fact instead of Fact & Fiction. Although it is still the leader in the field, its circulation, like that of all other science-fiction and fantasy magazines, has fallen precipitously over the last two decades. From a high of about 115,000 monthly sales in 1983, its total circulation in 2006 was only 28,319.