When it comes to Internet Relay Chat - IRC, the correct term would be IRC Clients as they help us to connect to IRC Servers, while Script IRC is just a programming language (scripting languages) used in IRC Clients such as ircii, BitchX, XChat, mIRC, Visual IRC, BersIRC and others. IRC scripts are only a part of IRC Clients, as they are a way to make commands easier, smaller and groupable, in addition to automating the response to certain events that happen while connected to an IRC Network (group of IRC Servers).
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