Span

Span could mean:

 span (unit of length)
 span (architecture)
 Span (band), a Norwegian punk rock band
 Switched Port ANalyzer, a way to monitor computer networks, similar to a network tap
 Linear span, in mathematics
 (co)spans in category theory
 wingspan, in Aerospace engineering (aircraft design)
 span and div in HTML
 CME SPAN - Standard Portfolio Analysis of Risk, a system developed by the Chicago Mercantile Exchange
 For powerlines, the distance between two pylons
 For aerial tramways, the distance between two supporting structures
 For a bridge, the distance between supporting pylons or towers.