Logos. Creating An Identity

A logo identifies a company or product. Logos are created to identity, not to explain.
According to Graphic Designer Jacob Cass, the 5 principles of effective logos are:

A logo must be simple
A simple logo design allows for easy recognition and allows the logo to be versatile and memorable. Effective logos feature something unexpected or unique without being overdrawn.

A logo must be memorable
Following closely behind the principle of simplicity is that of memorability. An effective logo design should be memorable and this is achieved by having a simple yet appropriate logo.

A logo must be timeless
An effective logo should endure the test of time. The logo should be ‘future proof’, meaning that it should still be effective in 10, 20, 50+ years time.

A logo must be versatile
An effective logo should be able to work across a variety of mediums and applications.

A logo must be appropriate
How you position the logo should be appropriate for its intended purpose.

[Source:Jacob Cass, Net Magazine, July 2011]
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Below are a few logos that I find follow these principles: