Skype, a free software, allows a <e1>hookup</e1> of multiple computer <e2>users</e2> to join in an online conference call without incurring any telephone costs.
Skype, a free software,
Skype, a free software, allows a hookup of multiple computer users to join in an online conference call without incurring any telephone costs.
<triplet> hookup <subject> users <object> Member-Collection(e2,e1)