Add to glossary: BD, OIG, USDC (#3824)

* Add to glossary: BD, OIG, USDC

* Update pages/general-information-and-resources/glossary.md

Oops, thanks!

Co-authored-by: Greg Walker <mgwalker@users.noreply.github.com>

---------

Co-authored-by: Greg Walker <mgwalker@users.noreply.github.com>

pages/general-information-and-resources/glossary.md

@@ -81,6 +81,8 @@ cSpell: ignore Technica
   - Gather all of the information for search to work
   - Trigger emails being sent
 
+- **BD** - Business Development. The process of looking for clients or partners.
+
 - **BOC** - Budget Object Code. Used for accounting.
 
 - **BPR** - Business Process Reengineering. This is when an organization designs
@@ -236,6 +238,9 @@ cSpell: ignore Technica
   by a project. The code can be read by a machine that then provisions the
   needed server.
 
+- **IG** or **OIG** - (Office of) Inspector General, the oversight division
+  within each federal agency, which verifies the agency is complying with laws.
+
 - **IGCE** - Independent Government Cost Estimate. Based upon SOW.
 
 - **Integrity** - means the soundness/fitness of purpose of our systems or
@@ -414,6 +419,9 @@ cSpell: ignore Technica
   This is the TTS Handbook, and you're probably reading it because you're an
   employee of TTS. TTS is part of FAS, which is part of GSA.
 
+- **USDC** - The [United States Digital Corps](https://digitalcorps.gsa.gov/) is
+  a two‑year fellowship program for early‑career technologists; a part of TTS.
+
 - **USDS** - The [United States Digital Service](https://www.usds.gov/) is a
   startup at The White House, using design and technology to deliver better
   services to the American people.