Explore the Great Indoors Map apps and websites have compiled quite a bit of outdoor cartography, but floor plans and diagrams for interior spaces are also available at certain locations. Read More…

Protecting Privacy Inside and Outside the House The incognito and private browsing modes built into most modern browsers shield your online activity at home — but maybe not to the rest of the world. Read More…

When the Tools of the Trade Are the Keyboard and Mouse For Daisuke Wakabayashi, who covers Google, computer accessories are important. Very important. Read More…

Staying Safer on Public Networks When using an open wireless network at a hotel or coffee shop, make sure that sites getting any of your personal information have their security certificates in order. Read More…

The Sun Sets. The Wind Dies. But Energy Data Is Relentless. Alternative power sources have upended the electric grid. Ivan Penn, who covers the beat, discusses the changes and how he keeps track of them. Read More…

How to Unlock Your Phone for Overseas Travel If you want to use a local data plan when traveling to another country, you might be able to get your carrier to free your phone for use on another network. Read More…

I Downloaded the Information That Facebook Has on Me. Yikes. Using a tool that Facebook offers its users, our columnist found out more than he wanted to know about the social network, the ad industry and himself. Read More…

Give Your Old Computer New Life If you’re not ready to buy a whole new system, you might be able to add new parts and upgrade your aging machine for less than a few hundred dollars. Read More…