News 2

Leslie Tita’s tone grows oddly anxious as he curls into the back of a Lyft, and speeds away from Howard University. Tita is a successful entrepreneur who owns a co-working space for entrepreneurs from Africa. He’s strikingly tall and sturdily built, with long fine dreadlocks and an infectious grin, and doesn’t seem the type to be worried about anything. But ask him about the “pipeline problem” in tech — the notion that tech companies don’t hire enough people of color because there is not enough available talent — and you’ll see his brow furrow.

Alex Roetter, Twitter's senior vice president of engineering, responded Thursday night to Leslie Miley, a former Twitter engineering manager who said the company's lack of diversity drove him to leave. Roetter offered an apology and called on himself, his company and the industry to work faster to bring more diversity to Silicon Valley.

How does a word become so muddled that it loses much of its meaning? How does it go from communicating something idealistic to something cynical and suspect? If that word is ‘‘diversity,’’ the answer is: through a combination of overuse, imprecision, inertia and self-serving intentions.

As technology reshapes industry, female engineers and computer scientists are reshaping their companies and the world. From leading advanced scale computing initiatives to heading digital startups and everything in between, women technologists are increasingly welcome and comfortable across the breadth of organizations describing themselves as technology-centric.