.S may refer to:
*
.S (file extension), used for assembler source code files
*
Dot-S
Dot-S (ドッツ, styled as .S) also known as Dot-Pin is a toy, similar to a Lite-Brite, created in 2005 by Japanese company Tomytec. The toys allow for the creation of pictures by placing colored pegs into holes in one or more boards. Many set ...
, a lighted toy
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