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diff --git a/doc/requirements/BufferedStream.md b/doc/requirements/BufferedStream.md
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+# BufferedStream
+
+## Abstract:
+
+One type that has to satisfy a BufferedStream operator and type.
+
+## Rationale:
+
+- HPC systems.
+- I/O systems.
+- HFT systems.
+
+## Example:
+
+```cpp
+BStream<BOperator, BType>;
+```
+
+BOperator must not flush at all times, but have the option to.
diff --git a/doc/requirements/UnbufferedStream.md b/doc/requirements/UnbufferedStream.md
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+# BufferedStream
+
+## Abstract:
+
+One type that has to satisfy an unbuffered Stream operator and type.
+
+## Rationale:
+
+- Fast and direct-flush operations.
+- High-Throughput systems.
+
+## Example:
+
+```cpp
+UBStream<UBOperator, UBType>;
+```
+
+UBOperator must flush at all times!
+