The first component of an electronic system is the ________________.
The first component of an electronic system is the User agent.
The first component of an electronic mail system is the user agent (UA). It provides service to the user to make the process of sending and receiving a message easier. Some examples of GUI-based user agents are Eudora, Outlook, And Netscape.
In computing, a user agent is software (a software agent) that is acting on behalf of a user. One common use of the term refers to a web browser telling a website information about the browser and operating system. ... For example, an email reader is a mail user agent.
The User-Agent request header contains a characteristic string that allows the network protocol peers to identify the application type, operating system, software vendor or software version of the requesting software user agent.