- Consumer-to-Consumer
- Content
- Content Management System
- Continuous Improvement Process (CIP)
- Contrarian
- Control Board
- Convenience Good
- Convenient
- Conversion
- COO
- Cook the books
- Cookies
- Coopetition
- Coordination loops
- Copy-cat
- Copyleft
- Core
- Core business
- Core competence
- Core staff
- Corporate Culture
- Corporate Design
- Corporate Identity
- Corporate Performance Measuring (CPM)
- Corporate policy
- Corporate Social Responsibility (CRS)
- Corporate venture capital
- Corporate Venturing
- Cost Center
- Cost Change Management
- Cost Driver
- Cost per action
- Cost per click
- Cost per lead
- Cost per point
- Cost per thousand
- Cost-benefit ratio
- Counterpart
- Coupreneurs
- Courseware
- Cover Story
- CPA
- CPC
- CPL
- CPM
- CPM
- CPM
- CPM
- CPMP
- CPO
- CPP
- CPT
- CPU
- Crack
- Crash Test Dummy
- Crippleware
- Critical Path Method
- CRM
- Cross-Channel-Marketing
- Cross-Selling
