| ISOC | IEEE Security Org Cipher 
| Others |
| ISOC | In Service Open Challenge
| Others |
| ISOC | In the Spirit Of Chartres
| Others |
| ISOC | Indonesia Serena Owners Community
| Others |
| ISOC | Industrial Security Oversight Certification
| Others |
| ISOC | Information Security Officers Conference
| Others |
| ISOC | Information Security Operations Center
| Others |
| ISOC | Institute for the Study of the Origins of Civilization
| Others |
| ISOC | Institutional Safety Office Contact
| Others |
| ISOC | Integral Science Operations Centre
| Others |
| ISOC | Integrated Smart Operations Center
| Others |
| ISOC | Integrated Spectrum Observation Center
| Others |
| ISOC | Integrated System On a Chip
| Others |
| ISOC | Intelligent System On a Chip
| Others |
| ISOC | Interconnect System On a Chip
| Others |
| ISOC | Internal Security Operations Command
| Others |
| ISOC | Internation Society Of Cultures
| Others |
| ISOC | International School Of Communication
| Others |
| ISOC | International Scout Owners Club
| Others |
| ISOC | International Series Of Champions
| Others |
| ISOC | International Society of Orthopaedic Centers
| Others |
| ISOC | International Student Organizing Committee
| Others |
| ISOC | Internet Society
| Others |
| ISOC | Introduction to Special Operations Course
| Others |
| ISOC | IP Security Operations Center
| Others |
| ISOC | Islamic Society of Orange County
| Others |
| ISOC | Islamic State Oil Company
| Others |
| ISOC | Isochronous
| Others |