Comic book letter column to expand the lettercols in his books to a second, separate page (such as "Flash-Grams — Extra", "Letters To the Batcave — Extra", and "JLA Mailroom — Special Peter Sanderson Edition") to facilitate Sanderson's sharp analysis. By the 1970s, nearly all mainstream comics included letter pages. Historian Matthew J. Pustz describes the different approaches of the two major publishers, DC and Marvel Comics: As the letter column became a longstanding tradition in the mainstream comic book industry, it even became a feature of underground, independent, and alternative comics of the 1970s and 1980s. In the 1990s, a trend in letter
Samsung Lee's death in 1987, Samsung was separated into four business groups – Samsung Group, Shinsegae Group, CJ Group and Hansol Group. Since 1990, Samsung has increasingly globalised its activities and electronics; in particular, its mobile phones and semiconductors have become its most important source of income. As of 2017, Samsung has the 6th highest global brand value. Notable Samsung industrial affiliates include Samsung Electronics (the world's largest information technology company, consumer electronics maker and chipmaker measured by 2017 revenues), Samsung Heavy Industries (the world's 2nd largest shipbuilder measured by 2010 revenues), and Samsung Engineering and Samsung C&T (respectively the world's