The World War II draft registration for OLD MEN (ages 44 to 64 years old in April 1942) is now available.
Use this registration information to add to your knowledge of the family before that 1940 census comes out!
The records for the men more age appropriate for fighting during World War II are still closed for privacy because of the privacy laws that cover them: some of them are still alive after all (as are an ever dwindling number of these men recorded.)
Some of the interesting aspects of this information, which is available through the National Archives and some other genealogy databases and resources, is the height and weight, eye color, profession and employer...
and maybe if you're lucky like I was you'll find a handwritten note such as "Wears Glasses and a Mustache!"