overview of stream and buffer

Author: jjmax75

buffers-and-streams/buffers.md

@@ -4,4 +4,8 @@ title: Buffers in depth
 url: buffers
 ---
 
-## Buffers 
+## Buffers
+
+### Usage
+
+The NodeJS Buffer class is a global class and therefore does not need to be imported into a module.

buffers-and-streams/index.md

@@ -15,17 +15,17 @@ The topics that are covered include:
 
 ## Buffers and Streams Overview
 
-The NodeJS APIS [Buffer](https://nodejs.org/docs/latest-v10.x/api/buffer.html) and [Stream](https://nodejs.org/docs/latest-v10.x/api/stream.html) are fundamentally seperate topics yet are intrinsically linked. This section will cover how these APIs work individually and with each other.
+The Node.js APIS [Buffer](https://nodejs.org/docs/latest-v10.x/api/buffer.html) and [Stream](https://nodejs.org/docs/latest-v10.x/api/stream.html) are fundamentally seperate topics yet are intrinsically linked. This section will cover how these APIs work individually and with each other.
 
 ### Buffer
 
-A buffer is a...
+The Node.js Buffer class implements buffers which are fixed size chunks of memory outside the V8 heap. Buffers are used to deal with binary data when dealing with TCP streams and reading/writing to the file system.
 
 [Buffers in depth](./buffers.md)
 
 ### Stream
 
-A Stream is a....
+The Node.js Stream module provides an API for working with streaming data. Streams are a fundamental concept in, and are prevalent throughout applications built on, Node. Streams are an efficient way to handle sending and receiving data particularly for large or indeterminate amounts of data.
 
 [Streams in depth](./streams.md)
 
@@ -39,8 +39,10 @@ A Stream is a....
 
 ## Exercise
 
-## Further Reading
+## Terminology
 
-MPJ intro to Streams - YouTube
+**Buffer**
 
-Net Ninja intro to Buffers and Streams - YouTube
+> In computer science, a data buffer (or just buffer) is a region of a physical memory storage used to temporarily store data while it is being moved from one place to another.
+>
+> -- <cite>[Wikipedia](https://en.wikipedia.org/wiki/Data_buffer)</cite>