Difference between far and near?

As you perceive. So there is a knock at the door. The man of the house opens the door and there is a snail on the stoop. The man leans over picks the snail up and gives it a heave. Three years later same house, same man, same knock. Man opens the door and the snail says "what in the hell was that all about". To a snail that was -far. To the man who drives to work 60 miles every day where he had thrown the snail was near. Sorry +5

This explains it better than I can -

http://www.youtube.com/watch?v=hf-HBMq9ggg

Depends how near you start and how far you want to go....

It's niether here nor there

the distance :)?

if you stand in the middle not difference

Here and there

As described at the beginning of this chapter, some compilers for PC compatibles use two types of pointers.
near pointers are 16 bits long and can address a 64KB range. far pointers are 32 bits long and can address
a 1MB range.
near pointers operate within a 64KB segment. There’s one segment for function addresses and one segment
for data. far pointers have a 16-bit base (the segment address) and a 16-bit offset. The base is multiplied by 16, so a far pointer is effectively 20 bits long. Before you compile your code, you must tell the compiler which memory model to use. If you use a smallcode memory model, near pointers are used by default for function addresses. That means that all the functions need to fit in one 64KB segment. With a large-code model, the default is to use far function addresses. You’ll get near pointers with a small data model, and far pointers with a large data model. These are just the defaults; you can declare variables and functions as explicitly near or far.
far pointers are a little slower. Whenever one is used, the code or data segment register needs to be swapped out. far pointers also have odd semantics for arithmetic and comparison. For example, the two far pointers in the preceding example point to the same address, but they would compare as different! If your program fits in a small-data, small-code memory model, your life will be easier.

Far & Near are at different lengths from A.

For me, absolute near is anything that I can reach while I'm sitting.

Near is anything within walking distance.

In terms of driving to a grocery store, near is anything within about 2 miles.

My wife lives about 7 miles away, but I consider her to be nearby as that applies to relationship geography.

Far is anything that's more than a day's drive away.

Perception

A piece of string..

this is really funny. its an Irish comedy, a priest is trying to explain to another priest the difference between small and far away ....

http://www.youtube.com/watch?v=GmU_q5xrnto

The difference is pretty subjective. I can feel far from somebody sitting by my side because I don't share his/her ideas. I can live far from my friends when they are actually one plane hour from my city. I can be near my brother just when he needs me.
I must conclude this is no rocket science but true human feeling.