At a seminar last week, a friend carelessly left his laptop on the lectern. When the next speaker came to deliver her speech, she — in a flurry of paper and book — pushed the machine off its precarious perch. The result: both the laptop and my friend seemed to be switched off for the rest of the day. Accidents such as these are not uncommon, especially if you take your precious machines to inclement environments outdoors. Panasonic’s Toughbook is an easy answer to such working conditions. Naturally, the people it appeals to often require these PCs to survive just