Lighting

A major reduction in the cost of lighting occurred with the discovery of whale oil. The use of whale oil declined after Abraham Gesner, a Canadian geologist, first refined kerosene in the 1840s, allowing brighter light to be produced at substantially lower cost.

MacBook Pro Laptop M2 Pro chip with 10‑core CPU

Asus Compro MacBook Pro Laptop M2 Pro chip with...

The unibody model debuted in October 2008 in 13- and 15-inch variants, with a 17-inch variant added in January 2009. Called the "unibody" model because its case was machined from a single piece of aluminum

$299.00

The Lenva 15" Laptop Casual Backpack B200 utilizes

Dell Series The Lenva 15" Laptop Casual Backpack B200...

With a wireless security camera, the video signal—and, with some, the audio signal as well—transmits over the internet or other wireless network to a receiver that connects to your viewing and recording device.

$19.00

Travel Laptop Backpack Business Computer Backpacks School Bag

Asus Compro Travel Laptop Backpack Business Computer...

Your speaker is waterproof, splash resistant, and dust proof. It is rated IP67 and IP64. You can immerse the speaker in water for up to 30 minutes at a depth of up to 3.3 ft (1 m). It can also be used while showering and in the rain or snow.

$149.00

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