Mr. Gore is still giving the slide show that “An Inconvenient Truth” was built around, but with changes that reflect a shift in the discussion of climate change.

Before there were apps for tablets and smartphones, before mathematics education software was easily installed on personal computers, before electronic calculators entered professional practice and ...

Looking for a home projector? Start by being clear about what you want it for: home theater (viewing in a dedicated, dark room), home entertainment (to work well under ambient light), or gaming (also ...