[incubator-skywalking] 01/01: Update README.md

[wusheng]

This is an automated email from the ASF dual-hosted git repository.

wusheng pushed a commit to branch wu-sheng-patch-1
in repository https://gitbox.apache.org/repos/asf/incubator-skywalking.git

commit d2f4eb4b12937f892ad7b195ee594ca5036cf8e9
Author: 吴晟 Wu Sheng <wu.sh...@foxmail.com>
AuthorDate: Mon May 14 20:50:50 2018 +0800

    Update README.md
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 56de5dd..676cc6b 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ microservices, cloud native and container-based (Docker, 
Kubernetes, Mesos) arch
 [![OpenTracing-1.x 
Badge](https://img.shields.io/badge/OpenTracing--1.x-enabled-blue.svg)](http://opentracing.io)
 
 # Abstract
-**SkyWalking** started as a distributed system in 2015. From 5.x, it evolved 
to the fully functional [Application Performance 
Management](https://en.wikipedia.org/wiki/Application_performance_management) 
+**SkyWalking** started as a distributed tracing system in 2015. From 5.x, it 
evolved to the fully functional [Application Performance 
Management](https://en.wikipedia.org/wiki/Application_performance_management) 
 system. It is used for tracing, monitoring, diagnose distributed systems, 
especially based on microservices, cloud native and container,
 including:
 - Distributed tracing and context propagation

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