or extended-length classical music, including complete symphonies. In 1938, Columbia Records hired Alex Steinweiss as its first art director. He is credited with inventing the concept of album covers and cover art, replacing the plain covers used before. After his initial efforts at Columbia, other record companies followed his lead. By the late 1940s, record albums for all the major companies featured their own colorful paper covers in both 10- and 12-inch sizes. Some featured reproductions of classic art while others utilized original designs. When the 10- and 12-inch long-playing records (LPs) came along in 1948, and box sets of 45-rpm records soon followed (see gramophone record), the name "album" was used for the new format of collections, and the creation of artistic original album covers continued. Formats From the 1950s through to the 1980s, the 12" LP record and the 45 rpm record became the major formats for the distribution of popular music. The LP format remains in use for occasional new releases, though other formats have largely supplanted it. The size of the typical cardboard LP sleeve cover is square. Starting in the mid-1990s, the compact disc (CD) was the most common form of physically distributed music products. Packaging formats vary, including the jewel case (which since 1982 has been the most popular form of CD packaging), and the cardboard and plastic combination commonly known as a Digipak (which has been a popular alternative form of packaging in recent years, but remains supplanted by the jewel case due to higher manufacturing costs and lower durability). Typically the album cover component of these packages is approximately square. In the 1980s and early 1990s, CDs were often sold as jewel cases enclosed within cardboard longboxes measuring by , which provided more space for album artwork than the jewel cases they contained, but were seen as harmful to the environment since the cardboard box was typically discarded by the buyer soon after purchase. Major record labels in the United States stopped distributing CDs in longboxes as of April 1, 1993. Design Album covers are one of the various ways in which first impressions affect an audience's perception of a given musician or band, or other content of the album. Album covers' design cover may also add to how an audience forms an opinion of them and their music. There are various ways in which an album cover is visualized. Some examples