sign

A sign is an object, quality, event, or entity whose presence or occurrence indicates the probable presence or occurrence of something else. A natural sign bears a causal relation to its object—for instance, thunder is a sign of storm, or medical symptoms signify a disease. A conventional sign signifies by agreement, as a full stop signifies the end of a sentence; similarly the words and expressions of a language, as well as bodily gestures, can be regarded as signs, expressing particular meanings. The physical objects most commonly referred to as signs (notices, road signs, etc., collectively known as signage) generally inform or instruct using written text, symbols, pictures or a combination of these.

The at-sign, @, normally read aloud as "at", also commonly called the at symbol or commercial at, and less commonly a wide range of other terms (such as the strudel), is originally an accounting and commercial invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £2 = £14). It was not included on the keyboard of the earliest commercially successful typewriters, but was on at least one 1889 model and the very successful Underwood models from the "Underwood No. 5" in 1900 onward. It is now universally included on computer keyboards. The mark is encoded at .

A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or documents. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, that the sender cannot deny having sent the message (authentication and non-repudiation), and that the message was not altered in transit (integrity).

A sign is an entity which indicates another entity.

Der Sign! Landmark Tower ist ein Hochhaus, das seit 2011 als Bürogebäude im Medienhafen Düsseldorf genutzt wird.

Zeichen (von althochdeutsch zeihhan ‚zeigen‘, ‚hinweisen‘) steht für:

• Schriftzeichen, die Grundeinheit der Schrift
• Zeichen, ein Grundelement der Kommunikation
• Zeichen, Zeitschrift über Aspekte der Gebärdensprache und der Gehörlosengemeinschaft
• Zeichen (Stadt Wehlen), Ortsteil der Stadt Wehlen, Landkreis Sächsische Schweiz-Osterzgebirge, Sachsen

• Sein (teken), een afgesproken teken in communicatie
  • Specifiek: spoorwegsein
• Île de Sein, een Frans eiland
• Île-de-Sein, de gemeente van het eiland.
• Stichting Epilepsie Instellingen Nederland

Sign est le 1single japonais des Brown Eyed Girls sorti sous le label NegaNetwork le 26 janvier 2011 au Japon. Il arrive 24 à l'Oricon et reste classé 4 semaines. Il sort en édition A (CD+DVD), B (CD+Calendrier+chanson bonus), C (CD+chansons bonus), et l'édition normale (CD).

arobase aussi @ peut faire référence à :

• Arobase, caractère typographique.
• "@", album de John Zorn et Thurston Moore.