Microsoft will release its Voice Command software for PDAs and mobile phones.
Microsoft Voice Command will allow users to dial contacts or check appointments on their calendars through voice-activated commands.
It is designed to work with Microsoft's Windows Mobile 2003 PDA operating system or the Windows Pocket PC Phone Edition software.
Drivers are expected to be the primary market for Voice Command, Microsoft said, as laws regulating mobile phone use while driving become stricter. Voice-activated software would allow drivers to keep both hands on the steering wheel and both eyes on the road.
Voice Command will also allow users to play songs on their PDAs or phones by speaking the name of the artist, song or album.
Applications such as Outlook, Internet Explorer and other software can also be launched using voice commands.
The software will be available for download from Handango.com or PocketPC.com for $39.95 (£24).
Tom Krazit writes for IDG News Service