Halayen sarrafawa, a cikin mahallin kwamfuta da sadarwa, yana nufin wani hali na musamman da ake amfani da shi don sarrafa fassarar ko halayen na'ura ko tsarin. Haruffa masu sarrafawa galibi ba haruffa ba ne waɗanda ba za a iya bugawa ba kuma galibi ana wakilta su da lambobi na musamman ko jeri na bits.Ana amfani da haruffan sarrafawa a cikin ka'idoji da harsunan shirye-shirye daban-daban don isar da umarni ko umarni zuwa na'ura ko tsarin. Suna aiki don fara takamaiman ayyuka, kamar tsara rubutu, sigina ƙarshen watsawa, ko gyara halayen shirin.Misalan haruffan sarrafawa sun haɗa da: Komawar Karu (CR): Wanda ke wakiltar lambar ASCII 13 (dicimal) ko 0x0D (hexadecimal), yana ba da umarni na siginan kwamfuta ko injin bugu don matsawa zuwa farkon layin na yanzu. Ciyarwar Layin (LF) : An wakilta ta lambar ASCII 10 (dicimal) ko 0x0A (hexadecimal), yana ba da umarni na siginan kwamfuta ko tsarin bugawa don matsawa zuwa layi na gaba. ) ko 0x1B (hexadecimal), ana amfani da shi don ƙaddamar da nau'ikan sarrafawa daban-daban ko jerin tserewa a cikin mahallin daban-daban. yana motsa siginan kwamfuta ko na'urar bugu wuri ɗaya a baya.Babu (NUL): Wakilta ta lambar ASCII 0 (decimal) ko 0x00 (hexadecimal), galibi ana amfani da ita azaman mai ƙarewa ko alamar padding a wasu aikace-aikace. .Waɗannan su ne ƴan misalai kaɗan, kuma akwai wasu haruffa masu sarrafawa da yawa waɗanda ke da ayyuka daban-daban dangane da tsarin ko ƙa'idar da ake amfani da su.