From 1900 on, volumes cover decades. Each volume has chapters covering broad subjects such as arts, education, politics, etc. Each chapter begins with important events, topics in the news, headline-makers, biographies of major figures, and a list is given of significant publications in that subject area during that decade. These large volumes have entries for every day in the year. Each day is divided into 10 categories.
International categories are world affairs, Europe, Africa and Middle East, Americas, and Asia.
The remainder cover the U.S., including politics and society, foreign affairs, economy and environment, science and technology, and culture and life styles. Invaluable for research on what happened certain days or months.