HP knows target marketing. Last April, for example, the company zeroed in on seniors with a new, low-cost, easy-to-use family of A4 inkjet all-in-ones, the DeskJet 2600 series (see “HP Targets Older Consumers with New DeskJet 2600 Series”). The DeskJet 2600 models feature, among other things, bigger buttons and simplified controls for aging boomers, whose