modern. The former is characterized by its similarly weighted lines, while the latter is distinguished by its contrast of light and heavy lines. Often, these styles are combined. By the twentieth century, computers turned typeface design into a rather simplified process. This has allowed the number of typefaces and styles to proliferate exponentially, as there now are thousands available. Unfortunately, confusion between typeface and font (the various styles of a single typeface) occurred in 1984 when Steve Jobs mislabeled typefaces as fonts for Apple computers and his error has been perpetuated throughout the computer industry, leading to common misuse by the public of the term "font" when typeface is the proper term. Experimental typeface uses "Experimental typography" is defined as the unconventional and more artistic approach to typeface selection. Francis Picabia was a Dada pioneer of this practice in the early twentieth century. David Carson is often associated with this movement, particularly for his work in Ray Gun magazine in the 1990s. His work caused an uproar in the design community due to his abandonment of standard practices in typeface selection, layout, and design. Experimental typography is said to place emphasis on expressing emotion, rather than having a concern for legibility while communicating ideas, hence considered bordering on being art. Techniques There are many facets to the expressive use of typography, and with those come many different techniques to help with visual aid and the graphic design. Spacing and kerning, size-specific spacing, x-height and vertical proportions, character variation, width, weight, and contrast, are several techniques that are necessary to be taken into consideration when thinking about the appropriateness of specific typefaces or creating them. When placing two or more differing and/or contrasting fonts together, these techniques come into play for organizational strategies and demanding attractive qualities. For example, if the bulk of a title has a more unfamiliar or unusual font, simpler sans-serif fonts will help complement the title while attracting more attention to the piece as a whole. Scope In contemporary use, the practice and study of typography include a broad range, covering all aspects of letter design and application, both mechanical (typesetting, type design, and typefaces) and manual (handwriting and calligraphy). Typographical elements may appear in a wide variety of situations, including: Documents Presentations Display typography (described below) Clothing Maps and labels Vehicle instrument panels As a component of industrial design—type on household appliances, pens, and wristwatches, for