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Unităţi de informaţie

Memorii DDRAM Module memorii DDRAM

În informatică şi telecomunicaţii, o unitate de informaţie este capacitatea folosita de unele sisteme standard de stocare a datelor sau canale de comunicaţie pentru a măsura capacităţile altor sisteme şi canale. În teoria informaţiei, unităţile de informaţie sunt folosite de asemenea şi pentru a măsura conţinutul informaţiei sau entropia unor variabile aleatorii.

Cele mai obişnuite unităţi sunt bitul (capacitatea unui sistem care poate fi doar în una din două stări), şi byte sau octetul (echivalent cu opt biţi independenţi). Unităţi mai mari pot fi formate pornind de la acestea cu ajutorul prefixelor decimale ale Sistemului Internaţional sau, mai nou, cu ajutorul prefixelor binare ale Comisiei Internaţionale pentru Electrotehică.

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