What does a status of "P" mean during a Tortoise CVS Update operation?

I ran an "Update" command on a folder with TortoiseCVS and one of the file statuses is "P". What does that mean? I see "U" which I'm assuming means "Update" and "M"开发者_StackOverflow中文版 which I'm assuming means "Merge". I tried to open the help file but I'm just getting 404s, so I think the firewall at my office is blocking the help contents...

Here's a screenshot of what I'm seeing:

_{(source: chomperstomp.com)}

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It's equivalent to a 'U', but CVS figured that sending a patch rather than the whole updated file would be smaller.

I couldn't quickly find a fuller explanation, but here's a table of codes.

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According to various sources, P refers to a file patched individually rather than updated (U).

See http://www.gjt.org/mlist/jcvs/msg01480.html and a bunch of others except I'm a new user so I can only post one link :-( for details.

I couldn't find any docs specifically for Tortoise CVS that explained this though.

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P stands for patch. It means only a small update was made, so the whole file did not need to be sent.