Seven
In a psychology class I took in College we devoted a months worth of classes to the number 7, how people can efficiently remember exactly seven things at any given time. So it was cool to see Paul Buchheit’s post We all have tunnel vision where he explains that since we can only hold seven items we should not try to forcibly hold more. This also goes along with my other post: Using Technology Vs. Inspecting Technology.
I remember little from that class, other than there is a reason why phone numbers are 7 digits.
