What is the difference between SMS, Instant Messaging Service (IMS), and E-mail?
E-mail and SMS are both “store and forward” systems that utilize a “gateway” to pass messages from senders to recipients, however, the obvious difference between the two are the length/complexity of the messages that can be sent on the respective systems. The maximim size of a SMS message is usually 160 characters (actual size is dependant on the service provider). The messages are limited to text and numeral characters. Graphics, colour, HTML formatting and file attachments are not allowed. On the other hand, e-mail can contain thousands of characters and allows the use of HTML formatting, files to be attached and images to be embedded within the message . Instant Messaging Service (IMS), (e.g. AOL Instant Messenger “AIM”, ICQ, MSN Messenger and Yahoo Messenger) allows you to conduct real-time text conversations (“chat”) with people who are simultaneously connected to the Internet and, in some cases, allow the transfer of files. SMS messages are immediate, but not simultaneous.
