Gender Metaphor

UNIX     = male
MAC      = female
Windows  = asexual

MAC OS X = a marriage of MAC and UNIX
   marriage works best where there is 
      respect, appreciation, cooperation 
      and where the partners retain there own personalities

Representation Metaphor

UNIX    = text oriented
MAC     = visual oriented
Windows = disoriented

Hierarchical File System

UNIX directory = MAC folder
UNIX uses / as separator in path

UNIX Building Block Metaphor

primitives: | > < >> ;
filter utilities: cut grep sed sort uniq
example: grep "HTML" *.html | wc -l

UNIX Layered Architecture

Shell
Applications/Utilities/User Programs
OS
Kernel
Device Drivers
Hardware