For years, the federal government, states, and some cities have enthusiastically made vast troves of data open to the public. Acres of paper records on demographics, public health, traffic patterns, energy consumption, family incomes and many other topics have been digitized and posted on the Web.

After IBM reported surprisingly weak quarterly profits and sales Monday morning, Virginia M. Rometty did something most unusual for an IBM chief executive. She joined the conference call with analysts, and forcefully made the case for investing heavily in new fields that promise growth in the future, despite a near-term financial setback.

Dennis M. Ritchie, who helped shape the modern digital era by creating software tools that power everything from search engines like Google to smartphones, was found dead Wednesday at his home in Berkeley Heights, N.J. He was 70.

In the aftermath of the great meltdown of 2008, Wall Street’s quants have been cast as the financial engineers of profit-driven innovation run amok. But the real failure, according to finance experts and economists, was in the quants’ mathematical models of risk that suggested the arcane stuff was safe.

With the economy weakening, chief executives want Wall Street to see them as tough cost-cutters who are not afraid to lay off workers. But plenty of job cuts are not trumpeted in news releases.

After a rocky beginning, the nonprofit group One Laptop Per Child thinks an advertising campaign will give a lift to the organization’s effort to place low-cost laptops in the hands of children in developing nations.

The government’s decision to take ownership stakes in America’s largest banks is a historic step that shifts power in the economy toward Washington and away from Wall Street.

Adrianne Yamaki, a 32-year-old management consultant in New York, travels constantly and logs 80-hour workweeks. So to eke out more time for herself, she routinely farms out the administrative chores of her life — making travel arrangements, hair appointments and restaurant reservations and buying theater tickets — to a personal assistant service, in India.