Companies in mobile/wireless systems

• International Telecommunications Union
• The European Broadcasting Union
• ETSI
• UMTS Forum
• GSM MoU Association
• Mobile Data Initiative
• Cellnet
• Ericsson
• Nokia
• Siemens
• Alcatel

• Motorola
• Vadem, former Paragraph
• IBM / CrossPad
• Interactive System Labs - they have the NPen++
• ART - the creators of smARTwriter
• 3COM - where Palm/graffiti is
• CIC - the creators of JOT
• PenOp - digital signatures and signature verification
• Cyber-SIGN - signature verification
• Quintet - signature verification
• Compaq/DEC - Itsy
• British Telecom - where the Future Pen was invented
• NYU MRlab - where "quickwriting" was invented
• NCP - promoters of "carbon" ink standard
• Scrawl - gesture and signature recognition
• Palm underground concepts