This wiki is an experiment to create a means for knowledgeable people to enter their information into some kind of a knowledge base. This is however, not the relatively formalized tone and style imposed by Wikipedia. Sentences starting with "I seem to recall" are perfectly welcome here - and articles do not have to be in the descriptive, encyclopedic style Wikipedia enforces. On the contrary, it is preferred that many of the articles be references, guides, helpful hints, suggestions, tutorials and so on.

If you have any information you want to contribute to this wiki, please, contribute it. We'd much rather remove or modify a dozen potentially unsuited submissions than miss out on a single good one. We hope this wiki grows into a useful resource for everyone interested in classic computing, no matter what their level of knowledge may be; it is meant to be all-encompassing. -- Tore & Lucky

The second edition of the book Structure and Interpretation of
Computer Programs (SICP) in info format. The HTML version can be found on https://mitpress.mit.edu/sites/default/files/sicp/index.html

Computer codes produced and supported by the RLE Computational Prototyping Group.
Includes FASTCAP, a multipole-accelerated capacitance extraction program,
FastImp
The c++ program FastImp is a wideband impedance extraction program for 3D geometries. It could perform Magneto-Quasi-Static (MQS), Electro-Magneto-Quasi-Static (EMQS) and fullwave analysis of complicated3D structures from zero frequency to at least tens of Giga Hertz. These 3D structures are commonly seen in interconnects and packages of VLSI circuits.

FastHenry
This is a multipole-accelerated inductance analysis program.

Found on http://www.pa3fwm.nl/technotes/, a technical note by Pieter-Tjerk de Boer, PA3FWM

Information about magnetic loop antennas, amplifiers and more.

General discussion group about Aispy and SDR# software. This is not the customer support!

AIRSPY is suite of affordable high performance Software Defined Radio (SDR) receivers for HF/VHF/UHF bands.
http://airspy.com

A simple SDR console application
SDR client and server for low bandwidth remote operation
Command line receiver for unattended operation
Transmit support (planned for v2 in 2018)
Primarily targeting Linux desktop and SBCs with limited resources
Written in cross-platform C/C++
Easy deployment thanks to minimal external dependencies

Nanosdr is still a work in progress with initial public release expected around the end of 2017

Useful tips for setting up keyboard shortcuts in (x)ubuntu.
The blog has a number of interesting articles about detecting and analysing RF and audio signals.

Battery powered, single channel digital oscilloscope which sends its plots via bluetooth to an iOS (Android will be supported later) device for display.

   Analog Bandwidth: 20 MHz
   Sample Rate: 100M samples/second
   Sample Resolution: 8 bits
   Connectivity: Bluetooth 4.0 with 100-ft+ range
   Input Range: +/-40V
   DC Accuracy: +/- 3%
   Offset Range: +/- 40V
   Sample Memory Depth: 4k
   Input Impedance: 1MΩ || 17pF
   Input Coupling: AC/DC
   Resolution: 100 mV/division to 10 V/division
   Compatibility: IOS (Android and Windows coming soon), open source app and protocol
   All day battery life: 8+ hours depending on settings
   Dimensions: 20 mm x 30 mm x 118 mm
   Weight: 56 g

A checklist to harden the raspberry π against attacks.
See also https://www.raspberrypi.org/blog/adafruits-read-only/ for information about making the file system read-only to prevent corruption by accidental power loss.