AT&T's 5ESS switch was a big deal to 1990s phone hackers.
        This is probably the best 5ESS textfile I've ever seen.
  TEXT AT$T 5ESS(tm) From Top to Bottom by Firm G.R.A.S.P.
       
        On the Northern Telecom ("Nortel") DMS-100 switch
  TEXT Understanding the Digital Multiplexing System Part One by Control C
  TEXT Understanding the Digital Multiplexing System Part Two by Control C
  TEXT Understanding the Digital Multiplexing System Part Two (B?) by Control C
  TEXT Notes on using the DMS-100 Switching System Interface
       
        On Bell's COSMOS system
  TEXT The Definitive COSMOS by Erik Bloodaxe
  TEXT Computer System for Main Frame Operations (COSMOS) Part One by King Arthur
  TEXT Computer System for Main Frame Operations (COSMOS) Part Two by King Arthur
       
        Other Bell System computer systems
  TEXT Computer-Based Systems for Bell System Operations by Taran King 
  TEXT Facility Assignment and Control Systems (FACS) by Phantom Phreaker
  TEXT Loop Maintenance Operations System (LMOS) by Phantom Phreaker and Doom Prophet
  TEXT The Fine Art of Telephony by Crimson Flash
       
        Added for the great descriptions of physically breaking into
        telephone company Central Office buildings, tapping SCCS lines, and more.
  TEXT Everything a hacker needs to know about getting busted by the Feds by Agent Steal
       
        The document that finally gave me the "a-ha!" moment regarding the
        origin of the term "Recent Change" in switch parlance
  TEXT Basic Concepts of Translation by The Dead Lord & The Chief Executive Officers
       
        Decent article on gaining access to other's phone lines via "junction boxes"
  TEXT The Art of Junction Box Modeming by Mad Hacker
       
        On X.25 / Telenet / Tymnet / etc hacking
  TEXT How We Got Rich Through Electronic Fund Transfers (EFTs) by The Legion of Doom
  TEXT Hacking & Tymnet by Synthecide
  TEXT BT Tymnet (1/3) by Toucan Jones
  TEXT BT Tymnet (2/3) BT-GNS Worldwide Asynchronus Outdial Service by Toucan Jones
  TEXT BT Tymnet (3/3) BT-GNS Worldwide Access Sorted By Node by Toucan Jones
  TEXT Western Union Telex, TWX, and Time Service by Phone Phanatic
  TEXT Everything you always wanted to know about Telenet Security ... by Phreak_Accident
  TEXT Tymnet Support for Customer's Data Security by Tymnet
  TEXT Telenet The Secret Exposed by Mad Max (cleaned up)
  TEXT Telenet The Secret Exposed by Mad Max (original)
  TEXT An Introduction To Packet Switched Networks by Epsilon
  TEXT NUA-List For Datex-P And X.25 Networks by Oberdaemon
  TEXT The Complete Guide To The DIALOG Information Network by Brian Oblivion
  TEXT Running a Board on x.25 by Seven Up
       
        LOD/H Technical Journal: Massive 3,000+ line text files
  TEXT Issue 1 (1987)
  TEXT Issue 2 (1987)
  TEXT Issue 3 (1988)
  TEXT Issue 4 (1990)
  TEXT Issue 5 (1993)
       
        Phrack's reporting on Robert Tappan Morris's infamous Internet worm
  TEXT A Report On The InterNet Worm by Bob Page
       
        The Hacker Crackdown: Law and Disorder on the Electronic Frontier
        By Bruce Sterling (1993)
  TEXT The Hacker Crackdown (full book text)
       
        Mother Earth Mother Board
        By Neal Stephenson (1996)
  TEXT Mother Earth Mother Board (full article text)
       
        Other textfiles
  TEXT Metal Shop Private's Phreak/Hack Sub
  TEXT Concerning Hackers Who Break into Computer Systems by Dorothy E. Denning
       
        On the OKI 900 phone and cellular cloning
  TEXT The Complete Oki 900 guide by IceBerg
       
        The alt.2600/#hack FAQ
  TEXT  The alt.2600/#hack FAQ by Voyager (beta .013 / 1996)
       
        "International Subversive": 1990s Australian hacking scene, "Underground" book, old school Julian Assange, etc
  TEXT Internationl Subversive Volume #1, Issue #1, 1991-08-21
       
        Textfile archives / mirrors
   DIR Phrack Archive