welcome hello and welcome to wikipedia thank you for your contributions i hope you like the place and decide to stay here are a few good links for newcomers how to edit a page editing policy conduct and structure tutorial picture tutorial how to write a great article naming conventions manual of style if you're ready for the complete list of wikipedia documentation there's also wikipedia topical index i hope you enjoy editing here and being a wikipedian by the way you can sign your name on talk and vote pages using three tildes like this four tildes produces your name and the current date if you have any questions see the help pages add a question to the village pump or ask me on my talk page again welcome thanks for your work last year on pgp things i recently stumbled across mean shortest distance which you created don't forget to link new pages from old ones it makes it more likely others will visit the page and maybe improve it mar utc