Great software inventions.

In my opinion, some of the greatest software inventions of our time are:
email,
search,
instant messenger,
youtube on the Internet;
and sms on mobile devices.

I can send all kinds of documents to people in an email.

I can learn so much of just about any topic of interest with a search engine.

I can do real-time technical diagnostics with a co-worker located thousands of miles away, in a different time zone, on an instant messenger.

I can "watch TV" and program the "channels" the way I want on my computer via youtube. What's more - this "TV" is international.

I can convey a message to someone, when I don't have the time or see the need to verbally speak to him/her, using sms.


From what I can see, these inventions greatly bring down the barriers traditionally posed by time and space, playing a big part in making everyone in the world that much closer. I'm quite glad to be in this industry, and to be living in this era.

What's gonna be the next killer app?