Introducing the OmniBook Taking Inventory OmniBook—Side View 11. PC Card slots (upper and lower). Accepts two Type II cards or one Type III card. 12. PC Card eject buttons (upper and lower PC Card slots). 13. Audio jacks (left to right): audio line-in, external microphone, audio line-out. 14. AC adapter jack. 15. Kensington lock slot (security connector). 16. Hard disk drive. 1-6