Pathopoeia \Path`o*poe"ia\, n.; pl. -ias. [NL., from Gr.
   paqopoii`:a; pa`qos passion + poiei^n to make.] (Rhet.)
   A speech, or figure of speech, designed to move the passion.
   --Smart.
   [1913 Webster]

IAS
       Interactive Application System (DEC)
       

IAS
       Internet Authentication Server (MS, Windows)
       

IAS

   1.  The first modern computer.  It had main
   registers, processing circuits, information paths within the
   central processing unit, and used Von Neumann's
   fetch-execute cycle.

   The IAS machine's basic unit of information was a 40-bit
   word and the memory had 4096 words.  A word stored in memory
   could represent either an instruction or data.  Each IAS
   instruction was twenty bits long, so that two instructions
   could be stored in each 40-bit memory location.  Each
   instruction consisted of an 8-bit operation code and a
   12-bit address that could identify any of 2^12 locations that
   may be used to store an operand of the instruction.

   The CPU consisted of a data processing unit and a program
   control unit.  It contained various processing and control
   circuits along with a set of high-speed registers for the
   temporary storage of instructions, memory addresses, and data.

   The main actions specified by instructions were performed by
   the arithmetic-logic circuits of the data processing unit.  An
   electronic clock circuit was used to generate the signals
   needed to synchronise the operation of the different parts of
   the system.

   [Who?  Where?  When?  Implemented using what?]

   2. Immediate Access Storage.

   (2003-10-24)