April 2020 Updates
Added a section on mypy And Reusing Variables With Different Types to the Python Type Annotations page.
Added a new page on Shift Registers (a digital logic circuit).
Added a section on Tags to the AWS S3 page.
Added a section on NoCAN to the CAN Bus page.
Added a new page on UML Diagrams.
Added a section on Flyback Transformers to the Transformers page.
Added info on non-standard QFN packages to the QFN Component Package page.