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What I am

People call me an animal

Since I possess a tail

but it's in the opposite direction.

I can't travel beyond some point

Since I am bound by my tail.

Sometimes I don't have a tail

But still I can not travel that far.

Go to the right and the world is easy for you.

Go to the left and change your mode.

You touch me often, but I won't bite you.

So what am I?

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A computer mouse

A mouse is an animal
The 'tail' comes out of the top, rather than the bottom
Some are wireless, so have no tail, but are still bound by the receiver's range
Going right takes you away from the keyboard, which is easy to do
I'm not sure about the left clue
You have your hand on it a lot without being bitten

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  • $\begingroup$ Yep correct...:) $\endgroup$ – user2408578 May 6 '15 at 12:47
  • $\begingroup$ What's the deal with the right and left? Me too can't figure out why going left changes mood $\endgroup$ – Damien Pirsy May 6 '15 at 12:49
  • $\begingroup$ Maybe the right / left clues are about using the mouse as right-handed or left-handed. As being right-handed is more common, that would make the world an easier place. Could "mood" refer to it's origins in the word "mode"? $\endgroup$ – Engineer Toast May 6 '15 at 12:49
  • $\begingroup$ I think (since right is away from the keyboard) it's because you can use a keyboard for emoticons/more general status updates? $\endgroup$ – LogicianWithAHat May 6 '15 at 12:51
  • $\begingroup$ Not for those lefthanded...for me, right is towards the keyboard. And I don't even use a reversed mouse as many lefthanded do, so I guess I'm bound not to understand this part :) $\endgroup$ – Damien Pirsy May 6 '15 at 12:52
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Maybe you are

a keyboard

People call me an animal

that's the one I miss, maybe a reference to the keyboard cat?

Since i possess a tail

that's the wire

but its in opposite direction.

when I'm using it, the "tail" is indeed in opposite direction

I cant travel beyond some point

well, the wire must not be unplugged

Since i am bound by my tail.

bound with the computer

Sometimes i dont have tail

wireless ones, maybe?

But still i can not travel that far.

Wireless, if I go too far, I might loose the signal

Go to right and world is easy for you.

numpad in on the right, and make life easier, compared to using the other numbers

Go to left and change your mood.

capslock is on the left, and often used to convey anger, on the forums

You touch me often but i wont bite you.

yes, I touch it very often (I wouldn't be able to answer, if not) .. and never been biten

But I'm not 100% sure

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  • $\begingroup$ Good try....but some clue's seems forcefully adjusted..:) $\endgroup$ – user2408578 May 6 '15 at 13:03
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The correct answer has been posted, but this was my initial guess.

I think you are:

A ring buffer or FIFO (first-in, first-out) queue

ring buffer

People call me an animal

Since I possess a tail

but its in opposite direction.

Not sure about the animal part. The tail can end up in front of the head once the head wraps around after having reached the end of the buffer.

I cant travel beyond some point

Since i am bound by my tail.

A ring buffer is considered full when head = tail-1 (mod N). At this point, the head can no longer advance and so you can no longer push data to the ring buffer.

Sometimes I don't have a tail

But still I can not travel that far.

The tail points to stale data once it has caught up to the head, i.e. head = tail. Even starting with no tail, the head can only advance by N, where N is the (finite) size of the ring buffer.

Go to right and world is easy for you.

Go to left and change your mode.

A ring buffer always travels to the right, towards increasing memory, until wrap-around occurs after a total of N steps.

You touch me often, but I won't bite you.

A ring buffer can be used many times per second, allowing information to transfer at rates of 100s of MB per second.

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