Quote Originally Posted by Passage
Thank you all for the education
One way to relieve some of the stress of carrying a chalk board around with you then finding you have left the chalk in your other jacket, might be to invest in a Palm Pilot (or similar), install the freeware "Photographer's Vade Mecum".

I have made good use of this function for close-up and photomacrography with 35mm, Medium and & Large Format for quite a number of years.