added ethernet, g's r, and books directory

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diff --git a/Ethernet b/Ethernet
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+========
+Ethernet
+========
+
+.. warning:: Under progress!
+
+History
+=======
+Bob Metcalfe first described the ethernet system in a memo while working at
+the Xerox Palo Alto Research Center in 1973 ([oreilly]_). It was based on
+the earlier *Aloha* system developed by Norman Abramson at the University of
+Hawaii. *Aloha* was a radio network for inter-island communications.
+
+Structure
+=========
+
+Data Frames
+~~~~~~~~~~~
+The frame format is the same for ethernet systems of any speed.
+
+====================       ===========
+Section                    Size (bits)
+====================       ===========
+Preamble                   64
+Destination Address        48
+Source Address             48
+Type Length                16
+Data                       46 to 1500
+Checksum                   32
+====================       ===========
+
+.. topic:: Preamble
+
+    The preamble originally served as a "warm up" period for hardware to 
+    stabilize and prepare for the rest of the frame.
+
+.. topic:: Source and Destination addresses
+
+    Manufacturers are given a 24 bit id (first half), and are expected to
+    ensure the uniqueness of the second half of each device's address.
+
+    The IEEE-SA (Standards Association) delegates addresses.
+
+.. topic:: Checksum
+
+    The checksum (or Frame Check Sequence) is a Cyclic Redundancy Checksum.
+
+.. [oreilly] `Ethernet: The Definitive Guide`:title:, by Charles Spurgeon.
+              O'Reilly, 2000
diff --git a/books/Gravity's Rainbow b/books/Gravity's Rainbow
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+=================
+Gravity's Rainbow
+=================
+
+:by: Thomas Pynchon
+
+Excellent German Words
+----------------------
+These are some of my favorites from http://www.hyperarts.com/pynchon/gravity/extra/german.html
+
+
+Weltschmerz
+    world-weariness
+Leunahalluziationen
+    gasoline hallucination
+Schweinheldfest
+    pig-hero festival
+Purpurstoff
+    purple substance
+Folgsamkeitfaktor
+    obedience factor
+Versuchsanstalt
+    research institute, experimental station
+Urstoff
+    primordial stuff
+Kadavergehorsamkeit
+    corpse-like obedience, i.e., slavish obedience
+Hinterhof
+    back-courtyard
+Bohnenkaffee
+    pure coffee
+
+Rocket Limericks
+----------------
+*(These are interspersed on pages 305-335)*
+
+|     There once was a thing called a V-2
+|     To pilot which you did not need to-
+|     You just pushed a button,
+|     And it would leave nuttin'
+|     But stiffs and big holes and debris, too.
+|
+|     <refrain:>
+|     Ja, ja, ja, ja!
+|     In Prussia they never eat pussy!
+|     There ain't hardly cates enough,
+|     There's garbage and that's enough,
+|     So waltz me around again, Russky!
+|
+|     There was a young fellow named Crockett,
+|     Who had an affair with a rocket.
+|     If you saw them out there
+|     You'd be tempted to stare,
+|     But if you ain't tried it, don't knock it!
+|
+|     There was a young fellow named Hector,
+|     Who was fond of a launcher-erector.
+|     But the squishes and pops
+|     Of acute pressure drops
+|     Wrecked Hector's hydraulic connector.
+|
+|     There once was a fellow named Moorehead,
+|     Who had an affair with a warhead.
+|     His wife moved away
+|     The very next day-
+|     She *was* always kind of a sorehead.
+|
+|     There was a technician named Urban,
+|     Who had an affair with a turbine.
+|     "It's much nicer," he said,
+|     "Than a woman in bed,
+|     And it's sure as hell cheaper than bourbon!"
+|
+|     There once was a fellow named Slattery
+|     Who was fond of the course-gyro battery.
+|     With that 50-volt shock,
+|     What was left of his cock
+|     Was all slimy and sloppy and spattery.
+|
+|     Ther was a young fellow named Pope,
+|     Who plugged into an *os*-cillo-*scope*.
+|     The cyclical trace
+|     Of their carnal embrace
+|     Had a damn nearly infinite slope.
+|
+|     There was a young fellow named Yuri,
+|     Fucked the nozzle right up its venturi.
+|     He had woes without cease
+|     From his local police,
+|     And a hell of a time with the jury
+|
+|     There was a young man named McGuire,
+|     Who was fond of the pitch amplifier.
+|     But a number of shorts
+|     Left him covered with warts,
+|     And set half the bedroom on fire.
+|
+|     There once was a fellow named Ritter,
+|     Who slept with a guidance transmitter.
+|     It shriveled his cock,
+|     Which fell off in his sock,
+|     And made him exceedingly bitter.
+|
+|     There once was a fellow named Schroeder,
+|     Who buggered the vane servomotor.
+|     He soon grew a prong
+|     On the end of his schlong,
+|     And hired himself a promoter.
+|
+|     There was a young man from Decatur,
+|     Who slept with a LOX generator.
+|     His balls and his prick
+|     Froze solid read quick,
+|     And his asshole a little bit later.