This is the 5213th most frequent Russian word.
ноутбуки
Laptops.
In this sentence, "ноутбуки" is used in the accusative plural form to denote the direct objects of the action.
Я купил новые ноутбуки для работы.
I bought new laptops for work.
Here, "ноутбуки" is in the nominative plural form, acting as the subject of the sentence.
Эти ноутбуки очень быстрые и удобные.
These laptops are very fast and convenient.
The word "ноутбуками" takes the instrumental plural form, used here to specify the topic of discussion.