diff --git a/...md.md b/...md.md
index 3463f18..515376c 100644
--- a/...md.md
+++ b/...md.md
@@ -32,9 +32,18 @@ Brief design details of POSIX wrapper
   - IO completions
   - Signals
   - Timers
-+ All underlying Win32 IO API calls are made asynchronous (non-blocking). Blocking semantics are implemented within the wrapper by an explicit wait for IO to complete.
++ All underlying Win32 IO API calls are made asynchronous (non-blocking). Blocking semantics are implemented within the wrapper by an explicit "wait_for_any" for IO to complete.
 + Uses [APCs](https://msdn.microsoft.com/en-us/library/windows/desktop/ms681951(v=vs.85).aspx) wherever available and minimzing use of [events](https://msdn.microsoft.com/en-us/library/windows/desktop/ms682655(v=vs.85).aspx). This simplifies code and has performance benefits.
-+ Maintains internal buffers to accommodate an underlying fundamental difference between POSIX and Win32 IO APIs - IOReady Vs IOComplete (Ex for a Read operation, POSIX APIs signal when IO is ready - date will be subsequently, explicitly read, Win32 APIs signal when IO has completed - data is already copied to a user provided buffer.
++ Maintains internal buffers to accommodate an underlying fundamental difference between POSIX and Win32 IO APIs - IOReady Vs IOComplete (Ex for a Read operation, POSIX APIs signal when IO is ready - date will be subsequently, explicitly read, Win32 APIs signal when IO has completed - data is already copied to a user provided buffer. Though this may be perceived as a performance hit, a validation exercise did not show any major impact. It in fact proved beneficial in reducing kernel calls during "read"s (ex. reading a header, would fetch the entire packet in a single call). 
++ Additional details on underlying Win32 calls used
+| POSIX IO call  |  Underlying Win32 IO call | Additional details |
+|-----|-----|
+| accept | AcceptEx | No APC semantics so, explicit event used for async IO   |
+| connect | ConnectEx | No APC semantics so, explicit event used for async IO |
+| send | WSASend |  |
+| recv | WSARecv |   |
+| open | CreateFile |   |
+| pipe | CreateNamedPipe  | A uni directional named pipe with and internal name is created, CreateFile called to connect from other end  |