Answer:
Ruby class libraries consist of a variety of domains, such as thread programming, data types, various domains, etc. These classes give flexible capabilities at a high level of abstraction, giving you the ability to create powerful Ruby scripts useful in a variety of problem domains. The following domains which have relevant class libraries are,
☛ GUI programming
☛ Network programming
☛ CGI Programming
☛ Text processing
☛ GUI programming
☛ Network programming
☛ CGI Programming
☛ Text processing
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