The noun "Chromebook" is a proper noun, a registered trademark owned by Google Inc. A proper noun is always capitalized.
The plural form of the noun Chromebook is Chromebooks.
The plural possessive form is Chromebooks'.
Example: The Chromebooks' display featured several models on sale.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is inches. The plural possessive is inches'.
The plural possessive of stepsister is stepsisters'.
The plural form is echoes. The plural possessive is echoes'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The plural possessive form of "weeks" is "weeks'."
The plural possessive of bandit is bandits'.
The plural possessive of "Father" is, "Fathers"