Stories by Juan Carlos Perez

Twitter is recovering from an unspecified technical problem that affected the microblogging service's main site and its APIs (application programming interfaces) for about one hour late Tuesday morning.

Attention to privacy on Facebook has been intense in recent months after the company made more profile information public by default, added options to its already-complicated privacy settings and introduced features to personalize external Web sites using people's profile information.

Expect Google to deepen its efforts in social media and social networking as part of its broader push to increase its display ad business.

Facebook's decision to offer end-users simpler options to configure privacy controls on the social-networking site has received an initial thumbs-up from industry experts and privacy watchdogs.

MasterCard is launching a program for external developers interested in tapping into some of the credit card giant's internal payment and data services to create applications.

People who want to shield their use of Google's Web search engine from network snoops now have the option of encrypting the session with SSL protection.

Google will make a strong pitch to enterprise programmers at its I/O developer conference Wednesday with the unveiling of a business version of its App Engine application hosting service and with new cloud portability initiatives in partnership with VMware.

Google will make its Wave collaboration and communication tool available to anyone who wants to try it out on Wednesday at its I/O developer conference.

Facebook is launching a new mobile site designed to be a speedier and cheaper option to its main mobile site.

When companies decide to swap out an on-premise enterprise software system for vendor-hosted SaaS applications, IT staffers often worry about what this change means for their jobs and their roles in the IT department.

CIOs and IT managers know they must address concerns like security, compliance, service levels and end-user resistance when moving to cloud-based enterprise software, but they must not overlook a critical area: the feelings of their IT staffers.

Google will stop selling its Nexus One online because the Android phone's <a href="http://www.google.com/phone">store</a> hasn't caught on with potential buyers, the company said Friday.

Online advertising spending grew 7.5 percent in the U.S. in the first quarter, a clear sign that the digital media industry is recovering from a rough 2009, according to the Interactive Advertising Bureau (IAB) and PricewaterhouseCoopers (PwC).

The Wikimedia Foundation has started rolling out a new look and upgraded functionality for Wikipedia that will be applied to all of the online encyclopedia's language versions over the coming weeks.

Google Calendar suffered a major outage on Thursday, the second crash in the past week for the company's hosted calendaring application.