Is it possible to know about others internet history activity?Though we delete our internet history from PC?

I heard that the main server authorities will defenitely know all the activities of our browser. At anytime they can reveal our internet activity to any required person.
Please give me full details.

Absolutely. Your ISP has logs of the ip addresses you have connected to. It isn't just your browser. It's any application you run that connects to the network. (WIndows Media Player, LimeWire, other illegal song downloading tools, QuickTime, you name it). If it connects to the internet, your ISP has a log of it.

Yes, they know every time you connected to a porno site, every time you connected to a site that sells illegal prescription drugs foreign countries, every time you connected to a service that lets you download copyrighted songs illegally.... am I getting warm???

They don't have a complete log of exactly what you did at those connections. But they definitely know you were there.

How long they maintain these and under what conditions they will give up the info to authorities is anybody's guess. But it is definitely in there.

Email - same thing. Your ISP's mail server keeps all the email that goes throught it for God-knows-how-long. So not only is there a record of your connections, the entire contents of all your messages are in there.

Internet commerce transactions (i.e. buying stuff from Amazon.com) at least use encryption to send things like your credit card numbers. So although your ISP will have a record that you connected to Amazon.com at 12:17 PM on Nov, 22, 2007, for example, they won't have your credit card number.

Oh, and deleting your internet history on a PC is a joke. If you are using Windows and Internet Explorer, you can start by clearing the history and browser cache. But Windows and IE squirrel away information in so many clandestine places, you'll never get rid of it all.

In short, NEVER assume that anything you do, say, read, download, or buy on-line is private. It is not.

Unless you take your pc or the main server out in the field and go all "Office Space" on it.. yes, there is always that possibility. ;) So if you're going where you shouldn't be, you should have little beads of sweat on your brow.. right about now. ;)

This exactally what some malicious spyware does. It sends what you are looking at.
I do not believe that the main server authorities can view what you are doing as this is a breach of human rights.

Mostly the answer is yes! I work in I.T. and know about computer forensics. Most ly the system administrator can "see" whats going on. There can filters set up to see what sites people are visiting. There many utilities also that can track IP's activity.
Also your ISP (Internet service provider) keeps logs of pc's activity and keeps copies of emails...sometimes for months and months.
Take care!

Ofcourse yes man.Every thing u do have a record in the server.but only the main informations like from which IP address,connection etc....not all the details inside u do is recorded..