The fundamental concept of continuations

[Terry Reedy]

<gnuist006 at gmail.com> wrote in message 
news:1191906949.179197.217470 at 57g2000hsv.googlegroups.com...
| Again I am depressed to encounter a fundamentally new concept that I
| was all along unheard of. Its not even in paul graham's book where i
| learnt part of Lisp. Its in Marc Feeley's video.
|
| Can anyone explain:
|
| (1) its origin
| (2) its syntax and semantics in emacs lisp, common lisp, scheme
| (3) Is it present in python and java ?
| (4) Its implementation in assembly. for example in the manner that
| pointer fundamentally arises from indirect addressing and nothing new.
| So how do you juggle PC to do it.
| (5) how does it compare to and superior to a function or subroutine
| call. how does it differ.
|
| Thanks a lot.
|
| (6) any good readable references that explain it lucidly ?

I am starting with the Wikipedia article 'Continuation' which has 
references both to other W. articles and several other books and papers.