Do you have particular terminology you're interested in?
The general subject is Micro Controller Units (MCUs) (and to a lesser extent System On Chip (SOC)s) which are becoming cheap ($5) and abundant enough to fuel the so-called Internet of Things (IoT) . There are various tangential topics such as:
* Computer architecture: e.g., "data bus", "SRAM", "Von Neumann architecture", "SPI flash", "Reduced Instruction Set Computing (RISC)", ARM, etc.
* Electrical engineering: e.g., "pulse trains", "servomotors", "Analog to Digital Converter (ADC) & vice versa (DAC)", "milliwatts (mW)", "milli-amp hours (mAh)", etc.
* Software engineering: "address spaces", "multi-threading", "stack", "Rust", "Low-Level Virtual Machine" (LLVM)", "[software build/compiler] toolchain", "Software Development Kit (SDK)", "GNU C Compiler (gcc)", etc.
* Network/Communication protocols: WiFi, "Bluetooth Low Energy (BLE)", "run-length-encoding", "little-endian", "Internet Protocol Version 6 (IPv6)", "Transport Layer Security (TLS)", etc.
Make magazine (especially their electronics and Arduino YouTube channels--see below) might be a good info gateway for you.
Given the low prices already mentioned, I'd say that if you're interested in learning more, a good way to go would be to order something like an AdaFruit Trinket (link below) (or a fully-fledged Arduino or one of the ESP8266 or ESP32 boards in this article) and seeing what you can accomplish with it. Sparkfun also has some good tutorials if you're already confident on the coding side.
maybe you also like embeddednodejs.com - the book is currently in early release (drop me a note if you like a proof reading version in exchange for a short book review) thanks!
