Scalix provides e-mail, group calendaring and other collaborative software, which are standard in groupware. For calendaring, CalDAV is a protocol allowing calendar access via WebDAV. It provided e-mail, calendaring and instant messaging. The application can import iCalendar calendars (.ics, the de facto open calendaring file format). Microsoft Exchange Server is a mail server and calendaring server developed by Microsoft. Calendar is the calendaring component of Outlook on the web. The Westlaw Litigator website provides access to legal calendaring and other litigation related applications. In 2015, Synacor acquired Zimbra, an open source email, calendaring, and collaboration software suite. In 1992 "Enable Office" added electronic mail, and calendaring software. Exchange Server is now to be simply e-mail and calendaring. PlanetAll was a social networking, calendaring, and address book site launched in November 1996. TPEs can also be processed by blow molding, melt calendaring, thermoforming, and heat welding. Mac OS X Server includes web-based Wiki, Weblog, Calendaring, and Contact services. The work being picked up by the "Calendaring Extensions Working Group" (ietf-calext WG). Calendaring software must also deal with daylight saving time (DST).