fix spelling mistake

README.md

@@ -3,25 +3,25 @@
 
 _Click here for Chinese README.[中文文档](https://github.com/catscarlet/cpustat/blob/master/README_zh-cn.md)_
 
-A very simple cpu usage percentages monitor tools for linux. Simply calculate and output cpu usage percentages in text. Two versions coding by shell and php.
+A very simple CPU usage percentages monitor tools for Linux. Simply calculate and output CPU usage percentages in text. Two versions coding by Shell and PHP.
 
 ###The reason why I made this
 
 _(You can skip this phase. This is just my complaint)_
 
-Nowadays there are a lot of tools that can collect, report, or save percentage of CPU time. They are very powerful because they can record cpu performance and save log, or they have a good readability with a GUI, such as sar and nmon.
+Nowadays there are a lot of tools that can collect, report, or save percentage of CPU time. They are very powerful because they can record CPU performance and save log, or they have a good readability with a GUI, such as `sar` and `nmon`.
 
-But I didn't find a tool which can simply output a percentage of cpu time.
+But I didn't find a tool which can simply output a percentage of CPU time.
 
-Earlier I wrote a system status monitor, so I need to find some tools to monitor the usage of cpu, memory and disk. I chose 'free' and 'df' to watch memory and disk. However, I couldn't find a simple tool to monitor cpu. I tried top and found it couldn't unfold cpu without interactive mode. Similarly found sar only record log and nmon only work in interactive mode.
+Earlier I wrote a system status monitor, so I need to find some tools to monitor the usage of CPU, memory and disk. I chose `free` and `df` to watch memory and disk. However, I couldn't find a simple tool to monitor CPU. I tried top and found it couldn't unfold CPU without interactive mode. Similarly found `sar` only record log and `nmon` only work in interactive mode.
 
-Even though they are powerful tools, and maybe they have a mode to output a simple or complex output, I only need a very simple tool to output a simple value of cpu usage, no need of history log, no need of interactive mode.
+Even though they are powerful tools, and maybe they have a mode to output a simple or complex output, I only need a very simple tool to output a simple value of CPU usage, no need of history log, no need of interactive mode.
 
 So I decided to write a tool to make myself satisfied.
 
 Note :
-- This project use 'cat /proc/stat' to collect information, using regex, so only work with Linux 2.6.24 and newer version because there are 9 columns. See in:[http://www.linuxhowtos.org/System/procstat.htm](http://www.linuxhowtos.org/System/procstat.htm)
-- Because Bash doesn't support floating calculation, so there is only integer %. I don't want to use bc to support floating calculation, because there is no need of such exact computation.
+- This project uses `cat /proc/stat` to collect information, using regex, so it only works with Linux 2.6.24 and newer version because there are 9 columns. See in:[http://www.linuxhowtos.org/System/procstat.htm](http://www.linuxhowtos.org/System/procstat.htm)
+- Because Bash doesn't support floating calculation, so there is only integer %. I don't want to use `bc` to support floating calculation, because there is no need of such exact computation.
 
 ##Install
 
@@ -31,7 +31,7 @@ Just copy files to your destination computer. Give bash_cpustat.sh execute permi
 
 ###PHP
 
-Run php_cpustat.php in php-cli, or open it in brower (need http service):
+Run php_cpustat.php in php-cli, or open it in browser (need http service):
 
 ####php-cli
 
@@ -51,9 +51,9 @@ php php_cpustat.php a
 
 ![php php_cpustat.php level=-a](https://raw.githubusercontent.com/catscarlet/cpustat/master/snapshot/php_cpustat_a_a.png)
 
-####brower
+####browser
 
-You can open php_cpustat.php in brower. Try to use curl easily:
+You can open php_cpustat.php in browser. Try to use curl easily:
 
 ```
 curl http://localhost/cpustat/php_cpustat.php
@@ -63,9 +63,9 @@ curl http://localhost/cpustat/php_cpustat.php
 
 ![curl php_cpustat.php level=a](https://raw.githubusercontent.com/catscarlet/cpustat/master/snapshot/php_cpustat_a_curl.png)
 
-php_cpustat.php don't support parameter in brower yet.You need to change the default output level instead.
+php_cpustat.php don't support parameter in browser yet. You need to change the default output level instead.
 
-**Notice:** If you open php_cpustat.php in brower, the output may seem in a mess because the it use LF for newline, not CRLF.
+**Notice:** If you open php_cpustat.php in browser, the output may seem in a mess because the it use LF for newline, not CRLF.
 
 **Notice:** If you want to change the default output level, edit the file and change the value of **$inforlevel = 'a';**