Key Specs What do the dashes mean?

Lenovo - Yoga 730 2-in-1 15.6" 4K UHD Touch-Screen Laptop - Intel Core i7 - 16GB Memory - NVIDIA GeForce GTX 1050 - 512GB SSD - Platinum Silver Dell - Inspiron 2-in-1 13.3" 4K Ultra HD Touch-Screen Laptop - Intel Core i7 - 16GB Memory - 512GB SSD + Optane - Black Dell - Inspiron 15.6" 7000 2-in-1 4K Ultra HD Touch-Screen Laptop - Intel Core i7 - 16GB - GeForce MX250 - 512GB SSD + Optane - Black 2-in-1 Design 2-in-1 Design Info Data Not Available — Data Not Available — Data Not Available — Backlit Keyboard Backlit Keyboard Info Data Not Available — Data Not Available — Data Not Available — Screen Size Screen Size Info Data Not Available — Data Not Available — Data Not Available — Touch Screen Touch Screen Info Data Not Available — Data Not Available — Data Not Available — Storage Type Data Not Available — Data Not Available — Data Not Available — Total Storage Capacity Data Not Available — Data Not Available — Data Not Available —