The document shows code examples of printing "Hello" greetings in different programming languages like Common Lisp, Scheme, Clojure, Ruby, and using different approaches like functions, macros. It also demonstrates basic Clojure REPL usage, loading files, documentation lookup, source viewing, and different ways to read lines from a file in Clojure.

8. (defun hello (name)
(print (concatenate 'string "Hello, " name "!")))
(hello "Common Lisp")
(define (hello name)
(print "Hello, " name "!"))
(hello "Scheme")
(defn hello [name]
(print (str "Hello, " name "!")))
(hello "Clojure")

20. def hello(name)
puts "Hello, " + name + "!"
end
hello "Ruby"
(defn hello [name]
(print (str "Hello, " name "!")))
(hello "Clojure")

21. def hello(name)
puts "Hello, " + name + "!"
end
hello "Ruby"
(defn hello [name]
(print (str "Hello, " name "!")))
(hello "Clojure")

22. (1 2 3)
["apple" "google" "microsoft"]
{:artist "Michael Jackson" :song "Thriller"}

23. person.getAddress().getZipCode()
(.getZipCode (.getAddress person))

24. person.getAddress().getZipCode()
(.getZipCode (.getAddress person))

25. person.getAddress().getZipCode()
(.getZipCode (.getAddress person))

26. person.getAddress().getZipCode()
(.getZipCode (.getAddress person))

27. person.getAddress().getZipCode()
(.getZipCode (.getAddress person))

28. person.getAddress().getZipCode()
(.. person getAddress getZipCode)

29. (car (list 1 3 5 7 9))
; -> 1
(cdr (list 1 3 5 7 9))
; -> (3 5 7 9)

30. (first (list 1 3 5 7 9))
; -> 1
(second (list 1 3 5 7 9))
; -> 3
(rest (list 1 3 5 7 9))
; -> (3 5 7 9)

33. #!/bin/sh
java -cp /path/to/clojure.jar clojure.main $*
$ clj
Clojure 1.2.0-master-SNAPSHOT
user=>
$ clj hello.clj
Hello, Clojure!

35. $ curl -O http://github.com/technomancy/leiningen/raw/stable/bin/lein
$ mv lein ~/bin/
$ chmod +x ~/bin/lein
$ lein self-install
$ lein repl
Clojure 1.1.0-master-SNAPSHOT
user=>

36. user=> (doc first)
(doc first)
-------------------------
clojure.core/first
([coll])
Returns the first item in the collection. Calls seq on its
argument. If coll is nil, returns nil.

37. user=> (use 'clojure.contrib.repl-utils)
(use 'clojure.contrib.repl-utils)
nil
user=> (source +)
(source +)
(defn +
"Returns the sum of nums. (+) returns 0."
{:inline (fn [x y] `(. clojure.lang.Numbers (add ~x ~y)))
:inline-arities #{2}}
...

38. user=> (use 'clojure.contrib.repl-utils)
(use 'clojure.contrib.repl-utils)
nil
user=> (show java.net.InetAddress)
(show java.net.InetAddress)
=== public java.net.InetAddress ===
[ 0] static getAllByName : InetAddress[] (String)
[ 1] static getByAddress : InetAddress (String,byte[])
[ 2] static getByAddress : InetAddress (byte[])
...

40. $ cat abc.txt
abc
defg
Clojure

41. user=> (slurp "abc.txt")
"abcndefgnnClojure n"
user=> (print (slurp "abc.txt"))
abc
defg
Clojure
nil
user=>

42. user=> (use '[clojure.contrib.duck-streams :only (read-lines)])
nil
user=> (doseq [line (read-lines "abc.txt")]
(println line))
abc
defg
Clojure
nil

43. for (String line : lines) {
System.out.println(line);
}
(doseq [line lines]
(println line))

44. user=> (use '[clojure.contrib.duck-streams :only (reader)])
nil
user=> (doseq [line (line-seq (reader (java.io.File. "abc.txt")))]
(println line))
abc
defg
Clojure
nil

45. user=> (with-open [rdr (java.io.BufferedReader.
(java.io.FileReader. "abc.txt"))]
(doseq [line (line-seq rdr)]
(println line)))
abc
defg
Clojure
nil