When the phrase 'killer app' was coined, it refered to finding the next killer app. It considered the previous killer app to be email. It was considered a killer app because it was quickly ubiquitous. However you asked what the first killer application was... I don't think that question is as easily answered because different people have different opinions. One might say that the Mosaic browser was the first killer app, but there could still be more before that, like Lotus 123. In general, Email was the first killer app to be called a killer app!
The plantation system was first developed by Portuguese explorers in West Africa.
John Deere developed the first successful steel plow in 1837.
It was developed many, many years ago.
Ray Tomlinson invented the first internet based email. The first email program was invented in late 1971 for the ARPANET while Tomlinson worked for BBN.
What was the first company to start selling Internet and email service to the public?
HTML was originally developed as an application inside SGML, but the first official version was HTML 2.0
Gmail is a client Email application which deals with clients. This application can be used to manage mails. The clients are the sender and receiver both.
Programming, its first major application was UNIX.
Mail2web is an email application that allows you to view all of your email accounts in a web interface. Mail2web requires you to type in your email's login information in order to use the application.
pop & imap
The first application of CRT technology was for an oscilloscope in 1897, and the first television using a CRT was developed in the late 1920s
The first application of CRT technology was for an oscilloscope in 1897, and the first television using a CRT was developed in the late 1920s
Only very obliquely; HTML has the facility to request an email to be sent (using the mailto directive), but the email application will be written in in another language (probably C, C++ or Java).
Roxio is the company that developed the Roxio Toast software application. Roxio Toast is a media conversion software application and an optical disc for Mac OS X.
internet
Maily is an email application for children and can be used on iPhones and iPads. It is an userfriendly email application that teaches children how to use applications and write emails.