1D, 1-D, or 1d can refer to: *

Alpha-1D adrenergic receptor The alpha-1D adrenergic receptor (α1D adrenoreceptor), also known as ADRA1D, is an alpha-1 adrenergic receptor, and also denotes the human gene encoding it. Receptor There are 3 alpha-1 adrenergic receptor subtypes: alpha-1A, -1B and -1D, all of ...

Astra 1D Astra 1D is a geostationary communications satellite launched in 1994 by the Société Européenne des Satellites (SES). , the craft remains in service for occasional use. Astra 1D was the fourth, and under original plans, last Astra communica ...

, a satellite *

Canon EOS-1D The Canon EOS-1D is a professional digital single-lens reflex camera launched in November 2001 as part of Canon's flagship EOS-1 series. It was the first digital camera in the EOS-1 line, succeeding Canon's final flagship film camera, the 1V. It ...

, Canon's first professional digital camera * Long March 1D, a satellite * One-dimensional space in physics and mathematics * One Direction, an English-Irish boy band * Penny (British pre-decimal coin), routinely abbreviated ''1d.'' * 1D, the hexadecimal code for the

Group Separator The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a cursor, ...

control character

See also