In music theory, the imperfect fifth (wolf fifth, Procrustean fifth, diminished fourth) is a dissonant music interval that spans seven semitones. It is a musical anomaly.

Imperfect Leaders is a Podcast by Jeffrey Cohn covering Business.

Imperfect Matter is a blog featuring topics from health and fitness to fashion or dance. Sections on the blog include Reviews, My Fitness Life, News, Travel, as well as Recipes. Previous posts on the site include July Fitness Fashion Blog, Healthy Flapjack Recipe, Sun, Sea & Sweat with 38 Degrees North, International Yoga Day, as well as Imperfect Matter x adidas AW15 Campaign. The blog is written in diary format with posts varying in length and often containing images. The blog was created by Cat Meffan stating: "The original idea for this blog was to be a diary of my health and fitness challenge - to get the lean body I have always wanted as well as getting back into my old dancing life. I’ve tried every diet in the book, but now need something that is more sustainable, if I’m to get fit and slim. You’ll also find things on here about fashion, jewellery, dance and probably music, as I’m not one for being too specific. I want to write about all of the things I enjoy, so apologies in advance for random pictures of tigers and penguins!" PR opportunities on the site include reviews. Cat can be reached via email. Pinterest: www.pinterest.co.uk/catmeffan/

Background and Format: Imperfectly Natural is run by Janey Lee Grace. In this blog she covers Lifestyle and beauty.

Imperial Beach Eagle & Times is Imperial Beach's only local newspaper covering Imperial Beach news.

Imperial Beach Eagle & Times Online covers News

Background and Format: Consistently rated amongst the world's best universities, Imperial College London is a science-based institution with a reputation for excellence in teaching and research. Imperial college of London also updates on daily news on various fields.

Background and Format: Imperial Engineer contains articles of current interest as well as news of the College, and of students past and present. The first issue of Imperial Engineer was dated Autumn 2004; prior to that the Journal was titled Imperial College Engineer. They source all of their own content and do not accept input from PRs. Audience and Readership: The magazine is aimed at past and present engineering students from Imperial College London. Frequency: Two issues per year. Circulation: The circulation figure is not disclosed. Distribution: The journal is available to members of the City & Guilds College Association and The Royal School of Mines Association. Ad Rates: The journal offers no advertising space. Other information: The journal does not accept press releases

Imperial Valley Press is a daily newspaper published for the residents of Imperial County, CA and surrounding areas. Topics covered include local, national and world news, sports, weather, entertainment and health news.

Imperial Valley Press Online covers News