AT&T's 5ESS switch was a big deal to 1990s phone hackers.
        This is probably the best 5ESS textfile I've ever seen.
 (TXT) AT$T 5ESS(tm) From Top to Bottom by Firm G.R.A.S.P.
       
        On the Northern Telecom ("Nortel") DMS-100 switch
 (TXT) Understanding the Digital Multiplexing System Part One by Control C
 (TXT) Understanding the Digital Multiplexing System Part Two by Control C
 (TXT) Understanding the Digital Multiplexing System Part Two (B?) by Control C
 (TXT) Notes on using the DMS-100 Switching System Interface
       
        On Bell's COSMOS system
 (TXT) The Definitive COSMOS by Erik Bloodaxe
 (TXT) Computer System for Main Frame Operations (COSMOS) Part One by King Arthur
 (TXT) Computer System for Main Frame Operations (COSMOS) Part Two by King Arthur
       
        Other Bell System computer systems
 (TXT) Computer-Based Systems for Bell System Operations by Taran King 
 (TXT) Facility Assignment and Control Systems (FACS) by Phantom Phreaker
 (TXT) Loop Maintenance Operations System (LMOS) by Phantom Phreaker and Doom Prophet
 (TXT) 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.
 (TXT) 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
 (TXT) 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"
 (TXT) The Art of Junction Box Modeming by Mad Hacker
       
        On X.25 / Telenet / Tymnet / etc hacking
 (TXT) How We Got Rich Through Electronic Fund Transfers (EFTs) by The Legion of Doom
 (TXT) Hacking & Tymnet by Synthecide
 (TXT) BT Tymnet (1/3) by Toucan Jones
 (TXT) BT Tymnet (2/3) BT-GNS Worldwide Asynchronus Outdial Service by Toucan Jones
 (TXT) BT Tymnet (3/3) BT-GNS Worldwide Access Sorted By Node by Toucan Jones
 (TXT) Western Union Telex, TWX, and Time Service by Phone Phanatic
 (TXT) Everything you always wanted to know about Telenet Security ... by Phreak_Accident
 (TXT) Tymnet Support for Customer's Data Security by Tymnet
 (TXT) Telenet The Secret Exposed by Mad Max (cleaned up)
 (TXT) Telenet The Secret Exposed by Mad Max (original)
       
        LOD/H Technical Journal: Massive 3,000+ line text files
 (TXT) Issue 1 (1987)
 (TXT) Issue 2 (1987)
 (TXT) Issue 3 (1988)
 (TXT) Issue 4 (1990)
 (TXT) Issue 5 (1993)
       
        Phrack's reporting on Robert Tappan Morris's infamous Internet worm
 (TXT) A Report On The InterNet Worm by Bob Page
       
        The Hacker Crackdown: Law and Disorder on the Electronic Frontier
        By Bruce Sterling (1993)
 (TXT) The Hacker Crackdown (full book text)
       
        Mother Earth Mother Board
        By Neal Stephenson (1996)
 (TXT) Mother Earth Mother Board (full article text)
       
        Other textfiles
 (TXT) Metal Shop Private's Phreak/Hack Sub
 (TXT) Concerning Hackers Who Break into Computer Systems by Dorothy E. Denning
       
        On the OKI 900 phone and cellular cloning
 (TXT) The Complete Oki 900 guide by IceBerg
       
        The alt.2600/#hack FAQ
 (TXT)  The alt.2600/#hack FAQ by Voyager (beta .013 / 1996)
       
        "International Subversive": 1990s Australian hacking scene, "Underground" book, old school Julian Assange, etc
 (TXT) Internationl Subversive Volume #1, Issue #1, 1991-08-21
       
        Textfile archives / mirrors
 (DIR) Phrack Archive