Update README.md

Author: abhidixi11

README.md

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 ## FreeRTOS+POSIX: Portable Operating System Interface (POSIX threading wrapper) for FreeRTOS
 
-The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. FreeRTOS+POSIX implements a subset of the [POSIX threading](https://pubs.opengroup.org/onlinepubs/7908799/xsh/threads.html) API.
+The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. FreeRTOS+POSIX implements *a subset* of the [POSIX threading](https://pubs.opengroup.org/onlinepubs/7908799/xsh/threads.html) API. This subset allows application developers familiar with POSIX API to develop a FreeRTOS application using POSIX like threading premitives. 
 
-With FreeRTOS+POSIX, an existing POSIX threading compliant application can be ported to run on the FreeRTOS kernel, and therefor leverage all the [Amazon FreeRTOS](https://www.freertos.org/FAQ_Amazon.html) functionality. Additionally, a library designed for use with POSIX threading compatible operating systems can be ported to FreeRTOS kernel based applications.
+With FreeRTOS+POSIX, an existing POSIX threading compliant application can not be ported to run on the FreeRTOS kernel, because FreeRTOS+POSIX does not implement more than 80% of the POSIX API.  Additionally, a library designed for use with POSIX threading compatible operating systems can not be ported to FreeRTOS kernel based applications using this wrapper.
 
 For more on FreeRTOS+POSIX, please visit [freertos.org](https://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_POSIX/index.html)