我想問"SMS"的英文全寫。

"SMS"的英文全寫是：
Short Message Service

short message service

Mass media is a term used to denote, as a class, that section of the media specifically conceived and designed to reach a very large audience such as the population of a nation state. It was coined in the 1920s with the advent of nationwide radio networks, mass-circulation newspapers and magazines, although mass media was present centuries before the term became common. The term public media has a similar meaning: it is the sum of the public mass distributors of news and entertainment across mediums such as newspapers, television, radio, broadcasting & text publishers. The concept of mass media is complicated in some internet media as now individuals have a means of potential exposure on a scale comparable to what was previously restricted to select group of mass media producers. These internet media can include personal web pages, podcasts and blogs.

The mass-media audience has been viewed by some commentators as forming a mass society with special characteristics, notably atomization or lack of social connections, which render it especially susceptible to the influence of modern mass-media techniques such as advertising and propaganda. The term "MSM" or "mainstream media" has been widely used in the blogosphere in discussion of the mass media and media bias.

短訊

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(重定向自短信)
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Image:SMS message on a Nokia phone.jpeg
諾基亞手機顯示用戶剛收到一則短訊


圖片參考：http://upload.wikimedia.org/wikipedia/commons/thumb/1/17/SMS-mobile.jpg/180px-SMS-mobile.jpg



圖片參考：http://zh.wikipedia.org/skins-1.5/common/images/magnify-clip.png
索尼愛立信手機顯示用戶正在使用注音編寫短訊
短訊﹙英文：Short Message Service，SMS）的簡稱，是行動電話服務的一種。有時也稱為信息、短訊息、文字訊息，此服務亦有許多英語的俗稱如「SMSes、text messages、messages或甚至於texts和txts」。短訊服務最早是在GSM系統手機上引入的，現在幾乎在任何手機系統上都能通用，如3G手機。
技術
短訊技術最早是在1991年開始應用於歐洲GSM系統，GSM協議03.40定義的是點對點﹙Point to Point；SM-PP﹚的方式，是用戶最常使用的方式。GSM協議03.41定義的是小區廣播短訊服務﹙Cell-Broadcast；SMS-CB﹚，也叫短訊廣播服務，讓發訊息者﹙個人用戶、企業、廣告商等﹚能夠對同一個蜂窩小區內的多人以廣播方式發送短訊，這樣當手機持有人進入這樣的小區時，就能收到小區廣播短訊。
一則短訊能夠容納140位元組，也就是約160個7位元的字元、或是140個8-bit的字元，中文字、韓文字與日文字這些占2-byte的字元則可容納70個。﹙使用Unicode系統﹚。這些不包括額外的系統資訊。