Razer Blade 15 Advanced 15.6″ 300Hz Gaming Laptop i7-10875H 16GB 512GB RTX2070S

Fifteen or 15 may refer to:

• 15 (number), the natural number following 14 and preceding 16
• one of the years 15 BC, AD 15, 1915, 2015

6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number.

A blade is the sharp, cutting portion of a tool, weapon, or machine, specifically designed to puncture, chop, slice, or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are intended to cut. This includes early examples made from flaked stones like flint or obsidian, evolving through the ages into metal forms like copper, bronze, and iron, and culminating in modern versions made from steel or ceramics. Serving as one of humanity's oldest tools, blades continue to have wide-ranging applications, including in combat, cooking, and various other everyday and specialized tasks.

Blades function by concentrating force at the cutting edge. Design variations, such as serrated edges found on bread knives and saws, serve to enhance this force concentration, adapting blades for specific functions and materials. Blades thus hold a significant place both historically and in contemporary society, reflecting an evolution in material technology and utility.

I7, i7, or I-7 may refer to:

• Intel Core i7, a brand of Intel processors
• BMW i7, an electric luxury sedan
• Inline-seven engine or straight-seven engine
• Interstate 7, a proposed Interstate highway in California
• I⁷, in music tonic, the secondary supertonic chord of IV
• i7, the former web portal for Seven Network, replaced by Yahoo7
• Japanese submarine I-7, an Imperial Japanese Navy submarine launched in 1935 and wrecked in 1943
• Paramount Airways' IATA code