Lew Platt, who rose from an entry-level engineer to become the chief executive of Hewlett-Packard, died Thursday night of an aneuryism. He was 64 years old. Platt led the Silicon Valley technology giant as CEO through most of the 1990s, serving a total of 33 years at the Palo Alto company. Platt joined HP in 1966 as an engineer in the company's medical products group. He moved up the ranks and was named president and chief executive officer in 1992. He succeeded HP co-founder David Packard as chairman in 1993, and was president, CEO and chairman until he retired in...