An administrator can go to Special:ThemeDesigner (it'll be on your tools in the toolbar too) and upload a logo in the Wordmark tab. The logo must be 150x65px, and as I recall must be a .PNG image.
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Yes there are flight crew jobs in air lines png
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The Edmonton Oilers were originally supposed to be called the
Edmonton Gulf Oilers and their logo was going to be similar to the
Gulf logo. That deal eventually fell through and the current logo
was then designed.
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You would like to use a portable extension such as: .png