A company logo is often considered the most critical element of a corporate brand. Stocklogos.com, an identity design community that offers high-quality logos, has compiled a list of before-and-after logos for 20 of the biggest brands.

Bell Telephone Company designed the original logo in 1900.

The British Airways logo was designed by Negus & Negus in 1973.

The canon logo was originally designed in 1933. The simpler version of the company’s identity was introduced in 1953.

The first Discovery Channel logo was designed in 1985.

The original, phoenix logo was designed in 2002. It was later changed to the firefox around 2004.

The simple GE script logo was first designed in 1892, with the circle around the initials added in 1900.

Since inception, IBM has gone through significant identity shifts. Not only updating the logo but also changing the name multiple times. This original logo was designed in 1889 and represents International Time Recording Company (ITRC).

The original Kodak logo was created in 1907, the most recent logo was adopted in 2006.

Lay’s first logo was designed in 1965. The brand then went three-dimensional with its current logo in 2007.

The first LEGO logo was designed in 1935 and, 26 iterations later, the brand seems to have settled on the simple block style logo that has been used since 1998.

Mazda’s simple logo first debuted in 1934.

McDonald’s used to be a barbecue until 1948, until discovering that hamburgers were their passion. From 1948 forward the company tried various versions of the iconic arches, coming up with today’s “I’m lovin’ it” in 2003.

Microsoft’s first logo was introduced in 1975. This latest version has been in place since 2011.

Back in 1889, the Japanese playing card company used this original logo which is three separate words: nin, ten, do. In 1967, the company began developing small electronic toys and took on the identity of Nintendo. The most recent logo was introduced in 2006.Nissan’s first logo was created in 1983 when Datsun adopted a new name.

The first shell was drawn in 1900. The company later fashioned the colorful, upright shell to create a more recognizable brand.

The logo was first designed in 1976 by Ronald Wayne. The border around the image reads: “Newton … A Mind Forever Voyaging Through Strange Seas of Thought … Alone.” The sleek logo everyone recognizes today was introduced in 2003.