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In page Bulletin board system:

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The introduction of the Smartmodem led to the first real wave of BBS systems. Limited in both speed and storage capacity, these systems were normally dedicated solely to messaging, both private email and public forums. File transfers were extremely slow at these speeds, and file libraries were typically limited to text files containing lists of other BBS systems. These systems attracted a particular type of user who used the BBS as a unique type of communications medium, and when these local systems were crowded from the market in the 1990s, their loss was lamented for many years.[citation needed]