diff --git a/glossary.md b/glossary.md
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--- a/glossary.md
+++ b/glossary.md
@@ -1,16 +1,79 @@
 You may also need to check https://chromium.googlesource.com/chromiumos/docs/+/master/glossary.md.
 
-* LGTM: "Looks good to me", commonly used to approve a code review.
-* PTAL: Please take a look.
-* RSLGTM: "Rubber-stamp looks good to me". The reviewer approving without doing
+* ABI: [Application Binary Interface](https://en.wikipedia.org/wiki/Application_binary_interface)
+* ASAP: As Soon As Possible.
+* BE: Big Endian - Byte order style in a multibyte data.
+  (Opposite of LE, Little Endian)
+* CI: [Continuous Integration](https://en.wikipedia.org/wiki/Continuous_integration).
+* CITGM: Canary In The Gold Mine - a smoke test unit in the repo that
+  contain popular npm modules.
+* CJS: Common JS.
+* CLDR: [Common Locale Data Repository](https://en.wikipedia.org/wiki/Common_Locale_Data_Repository).
+* CLI: [Command Line Interface](https://en.wikipedia.org/wiki/Command-line_interface).
+* CVE: Common Vulnerebilities and Exposures - A database that
+  maintains reported security exposures.
+* ECMA: European Computer Manufacturers Association - A body that
+  governs JS spec among other things.
+* EOF: [End Of File](https://en.wikipedia.org/wiki/End-of-file)
+* EOL: End Of Line (when used within a program), End of Life
+  (when used within project documents).
+* ESM: ECMA Script Module.
+* ETW: Event Tracing for Windows.
+* FFDC: First Failure Data Capture - Common terms for logs, traces
+  and dumps that are produced by default on program error.
+* FIPS:  Federal Information Processing Standards.
+* FS: File System.
+* ICU: International Components for Unicode.
+* IPC: Inter Process Communication.
+* JIT: [Just In Time](https://en.wikipedia.org/wiki/Just-in-time_compilation)
+  Is a way of executing computer code that involves compilation during execution
+  of a program `at run time` rather than before execution.
+* JS/C++ boundary: It refers  to the boundary between V8's runtime and the
+  JS code execution which are commonly crossed when invoking JS functions with
+  C++ linkage (e.g. interceptors). The boundary could very well exist when we
+  are reaching into the C++ to do something that has nothing to do with the
+  platform, e.g. URL parsing.
+* LGTM: Looks good to me - commonly used to approve a code review.
+* LTS: Long Term Support.
+* MDN: [Mozila Development Network](https://developer.mozilla.org/en-US).
+* OOB: Out Of Bounds - Used in the context of array(memory) access.
+* OOM: Out Of Memory.
+* PPC: Power PC.
+* PTAL: Please Take A Look.
+* RAII: [Resource Aquisition Is Intialization](https://en.wikipedia.org/wiki/Resource_acquisition_is_initialization)
+* REPL: Read Evaluate Print Loop. REPL is available as a standalone program
+  (invoke node without arguments), used for developing / testing small programs.
+* RFC: Request For Comments.
+* RSLGTM: Rubber-Stamp Looks Good To Me. The reviewer approving without doing
   a full code review.
+* RSS: [Resident Set Size](https://en.wikipedia.org/wiki/Resident_set_size).
+* SMP: Symmetric Multi Processor.
 * TSC: Technical Steering Committee. Detailed info see
   [TSC](./GOVERNANCE.md#technical-steering-committee).
-* WIP: "Work In Progress" - e.g. a patch that's not finished, but may be worth
-  an early look.
+* V8: JavaScript engine that powers Node.js and chrome browser.
+* VM: The [VM module](https://nodejs.org/api/vm.html) provides a way of
+  executing JavaScript on a virtual machine.
+* WASI: [Web Assemby System Interface]( https://github.com/WebAssembly/WASI)
+* WASM: Web Assembly.
+* WG: Working Group - autonomous teams in the project with specific
+  focus areas.
+* WHATWG: Web Hypertext Application Technology Working Group
+* WIP: "Work In Progress" - e.g. a patch that's not finished, but
+may be worth an early look.
 * WPT: [web-platform-tests](https://github.com/web-platform-tests/wpt)
-* godbolt: [Compiler Explorer](https://godbolt.org/) run compilers interactively
-  from your web browser and interact with the assembly. Was created by and is
-  primarily administrated by Matt Godbolt.
-* primordials: Pristine built-ins that are not effected by prototype pollution
-  and tampering with built-ins.
+* bootstrap: Early phase in the Node.js process startup - that sets up
+  the Node.js execution environment and loads the internal modules.
+* code cache: A chunk of bytes storing compiled JS code and its metadata.
+* deps: upstream projects that this project depends.
+* godbolt: [Compiler Explorer](https://godbolt.org/) run compilers
+  interactively from your web browser and interact with the assembly.
+  Was created by and is primarily administrated by Matt Godbolt.
+* native modules/addons: A module / shared library that is
+  implemented in C/C++, but exposes one or more interfaces,
+  callable from JS.
+* primordials: Pristine built-ins that are not effected by prototype
+  pollution and tampering with built-ins.
+* snapshot: When referring to the V8 startup snapshot, a chunk of
+  bytes containing data serialized from a V8 heap, which can be
+  deserialized to restore the states of the V8 engine.
+* vendoring: consuming external software into this project.