What does vCard (.vcf) mean?
vCards are often attached to e-mail messages, but can be exchanged in other ways, such as on the World Wide Web or Instant Messaging. They can contain name and address information, phone numbers, e-mail addresses, URLs and photographs.
Example vCard File (v 3.0)
BEGIN:VCARD
VERSION:3.0
N:Gump;Forrest;Mr.
FN:Forrest Gump
ORG:Bubba Gump Shrimp Co.
TITLE:Shrimp Man
PHOTO;VALUE=URL;TYPE=GIF:http://www.example.com/dir_photos/my_photo.gif
TEL;TYPE=WORK,VOICE:(111) 555-1212
TEL;TYPE=HOME,VOICE:(404) 555-1212
ADR;TYPE=WORK:;;100 Waters Edge;Baytown;LA;30314;United States of America
LABEL;TYPE=WORK:100 Waters Edge\nBaytown, LA 30314\nUnited States of America
ADR;TYPE=HOME:;;42 Plantation St.;Baytown;LA;30314;United States of America
LABEL;TYPE=HOME:42 Plantation St.\nBaytown, LA 30314\nUnited States of America
EMAIL;TYPE=PREF,INTERNET:forrestgump@example.com
REV:2008-04-24T19:52:43Z
END:VCARD
Detailed info : http://en.wikipedia.org/wiki/VCard