Doubt in apache error logs

Hi,
I have a doubt in apache errors logs, It did check within various Box and found that,

1) I have check with different server with apache access_logs,
and I found that in first server with OS, browser version, etc.,,

xx.xxx.xxx.xx - - [12/Feb/2009:04:03:13 -0600] "GET /index/bar_left.jpg HTTP/1.1" 304 - "(URL address blocked: See forum rules)/ATA-250E.htm" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; Media Center PC 5.0; .NET CLR 1.1.4322; InfoPath.2)"

And in the second server I could not find the above mentioned.,

xxx.xx.xxx.xx - - [12/Feb/2009:21:49:29 -0500] "GET /~boxbox/bbs/images/default/menu_itemline.gif HTTP/1.1" 200 151

And in further clarification, I did check with another box and come out with the below:

127.0.0.1 - - [19/Jan/2009:13:10:41 -0600] "OPTIONS * HTTP/1.0" 200 -

Can you please clear by doubt.*

This is controlled by the LogFormat directive in your Apache configuration - you can change it to pretty much whatever you want