In the Navy: white T-shirts under shirts at work

Another mystery of corporate dress etiquette in America is the t-shirt under the shirt particularly in hot weather  One old timer suggests this saves on laundry costs and the shirt may be worn for some extra days as the t-shirt soaks the daily grime. Yick.  The corporate dress code includes suit trousers typically two inches higher than in the UK, flapping around the ankles is acceptable.  Blackberries may be worn in holsters, like a gun, with no sense of irony.  And haircuts are short, short, like you've joined the Marines.  The military-industrial complex may be a faint echo of the post-war prime of this fine nation, but corporate America still tips hats to it.