decal's security shed

legacy technology


The National Security Agency's relationship with MULTICS (UNIX predecessor) as preserved by NNTP/Usenet via UUCP

Goodbye time-sharing, hello multi-tasking: a story about the end of a process scheduling era

Text file listing USENET NNTP newsgroups

Access Certificates for Electronic Services Crypto Policy by


Archives, Backup, Data Rot, etc.

The Library of Congress: Digital Preservation

Soldier of Fortran: Mainframe Hacking at its Finest!

Harvard Dataverse Network

The Data Preservation Alliance for the Social Sciences (Data-PASS)
voluntary partnership of organizations created to archive, catalog and preserve data used for social science research
examples include: opinion polls; voting records; surveys on family growth and income; social network data; government statistics and indices; and GIS data measuring human activity

California Digital Library Web Archiving Services

Delaware Digital Video Factory

CBS Sunday Morning: Keeping up with Data Rot - Resellers of Surplus Computer Hardware and Software

Radio Shack

Tim Mann's TRS-80 Pages


VMS remains secure at DEFCON9 hacker fest

VMS FAQ by SavillTech

HP OpenVMS Guide to System Security, Chapter 4: Protecting Data

DEFCON;16 featured talk about "Hacking OpenVMS"

Digital Equipment Computer User Society Library Compendium

WASD VMS Web Services

VMS Help *Conan The Librarian

DCL Dialogue Online

Dave Cutler

IBM (International Business Machines)

The Fifth HOPE (2004): AS/400: Lifting the Veil of Obscurity

The Hercules System/370, ESA/390, and z/Architecture Emulator
(runs under Linux, Windows, Solaris, FreeBSD and Mac OS X)

IBM Resource Access Control Facility (RACF)

z/OS Security Technical Implementation Guide from the Defense Information Systems Agency Information Assurance Support Environment


Linux for S/390 Big Iron


TWENEX.ORG, PANDA TOPS-20 Monitor 7.1(21733)-4
(public telnet server offers free accounts with compilers for various legacy/nostalgic programming languages)

Web Index with Plenty of TOPS-20 Documentation

Web Interface to Public Access TOPS-20 System

Emulation, Abstraction, Virtualization, etc.

Browser emulation of the Weerd game written for the Radio Shack&circler; TRS/80.

FreeVMS: An open source GPL-licensed VMS clone for the amd64 architecture
(currently distributed as a bootable qemu image; source code available from git server)

The Computer History Simulation Project
(The goal of the project is to create highly portable system simulators and to publish them as freeware on the Internet.

The Hercules System/370, ESA/390, and z/Architecture Emulator
(runs under Linux, Windows, Solaris, FreeBSD and Mac OS X)

Blue Basic is a heavily modified port of the TinyBasic interpreter developed to run on Texas Instruments IC's (Integrated Circuit chips)

Mainframes, Supercomputing, etc.


Great Microprocessors of the Past and Present (V 12.2.0)

Bulletin Board Systems, Multi-User Dungeons, and Other ANSI Art Stuff

MUDStats.Com is a statistics and information website for MUDs

Mystic BBS (Under Development in 2015!)

Jason Scott's BBS Documentary

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