Below are the course notes I prepared for the training course
I gave to engineers in the late 1980s/early 1990s on
Computer Technology (including those on, Basic Electrical
Theory, Electromechanical Devices, Basic Electronic
Theory, Digital Electronics, Computer Architetcure, Mass Storage
Techniques, Environmental Considerations and an Appendix with
useful information such as SI Number Notation, SI Units,
Physical Constants, Common Equations and Mechnical Engineering
These course sections were all compiled into one large volume,
the Basic
Computer Engineering Course Notes, which were given to
each student of the course
Below are extracts from the course notes and also the
flipchart diagrams I prepared for the Ethernet Course engineers
on physical media, access control, TCP/IP protocols and Time
Domain Reflectometry in the late 1980s/early 1990s
The Bee Sting or Vampire Tap for Thicknet 10 Base5 coaxial 50
ohm cable - often installed incorrectly, as the hole to the
central coax conductor had to be drilled through the clamp after
installtion, to register the correct depth for the conductor to
make good contact
The importance of 50 ohm terninator installation (to prevent
signal reflection and resulting collisions because impedance
mismatch at the cable end) and the of rules on number of
Repeaters and IRLs (Inter Repeater Links)
CSMA/CD - Carrier Sense Multiple Acces/Collison
Detect
Network Slot Time and Truncated Binary Exponential Back off Algorithm
I later produced this more detailed
slide, during my career in Networking PreSales, on the
Truncated Binary Exponential Back off Algorithm and polynomial
CRC Check, as part of a detailed
Ethernet LAN
Technolgies presentation 
Ethernet frame format and the difference between that in
Ethernet Version II and IEEE 802.3
For more on Ethernet design origins, click here for the Ethernet section of my History of the Internet
The Ethernet and TCP/IP Five Layer Model and
packet assembly/disassembly
For more on the TCP/IP Five
Layer Model Vs the OSI Seven Layer Model, click here for the Protocol
Wars section of my History of the Internet