As we all know that E-mail is an abbreviation of Electronic mail which we use for sending messages, photos, or files through the internet connection. However, except the word ‘To’ have you ever noticed the words CC and Bcc? And do you know what it is?
Electronic e-mail has been used in order to send messages from one to another since 1965. Sending an e-mail is like sending a letter, but it is more convenience, for example, we can add more things to send such as photos, files, music or everything that we want. Just type the e-mail address that you want to send a message into the blank “To” and click send.
CC is an abbreviation of Carbon copy. The e-mail address that is typed into this blank will receive the messages in the same way as “To”; however, there is the only difference between ‘To’ and ‘CC’ that is the receiver from CC sending doesn’t need to reply the message because this kind of sending is used for telling news or just announcement, and all receivers can see other e-mail addresses; they can know how many people or who we send this e-mail to.
Bcc is an abbreviation of Blind Carbon Copy. This kind of sending is used in order to keep privacy. The e-mail that is typed in this Bcc blank will be kept into a secret, which means the receiver cannot see other e-mail addresses; they cannot know how many people or who we send this e-mail to except himself.
P.S if you don't understand, you can ask me for thai version ^^
credit: http://guru.google.co.th/guru/thread?tid=07e65a49ac852a0a&clk=wttpcts
http://www.dek-d.com/content/lifestyle/19380/Cc-กับ-Bcc-ใน-E-mail-คือ-.php