"Planisphaerium" typically refers to a type of celestial map or star chart that presents a two-dimensional representation of the night sky. The term can also relate to specific tools or devices used for celestial navigation, such as star globes or planispheric astrolabes.

David E. Rowe is a prominent figure in the field of engineering and applied mathematics, known for his contributions to various areas including engineering education and research. However, without more specific information, it's difficult to pinpoint which David E.

Amir Aczel was a mathematician, author, and professor known for his work in the fields of mathematics and the philosophy of mathematics. He was particularly recognized for his ability to explain complex mathematical concepts to a general audience. Aczel wrote several popular books that explore mathematical ideas and their implications in various fields, including history, science, and philosophy.

David Eugene Smith (1860–1944) was an American mathematician, educator, and author known for his contributions to the field of mathematics education. He played a significant role in the dissemination of mathematical knowledge through his writings and teachings. Smith authored several textbooks, many of which focused on the teaching and learning of mathematics at various educational levels. In addition to his work in education, he was involved in the development of mathematics curricula and participated in various mathematical organizations.

Jean van Heijenoort was a notable figure in the fields of logic and mathematics, particularly recognized for his contributions to the history and philosophy of logic. Born on January 31, 1912, and passing away on July 4, 2010, he was a mathematician, historian, and philosopher known especially for his work on formal logic and the foundations of mathematics.

Kenneth O. May was a prominent American mathematician known for his contributions to the fields of mathematics, particularly in the areas of topology and the philosophy of mathematics. He was born in 1915 and passed away in 2005. May is recognized for his work on the foundations of geometry and topology, as well as for his involvement in educational and mathematical organizations. One of his notable contributions is the May theorem, which deals with homotopy theory and the study of topological spaces.

Rosalind Tanner is not a widely recognized figure or term in common knowledge. It could potentially refer to a specific individual, fictional character, or a term used in a niche context.

The 1920s was a pivotal decade for the fields of electronics and early computing concepts, although it predates the modern era of computers as we know them today.

As of my last update in October 2023, "David Joseph Singh" does not appear to refer to a widely recognized public figure, event, or concept. It's possible that he could be a lesser-known individual, or a private citizen.

The 1970s was a transformative decade in the field of computing, marked by significant advancements and developments that laid the foundation for modern computing. Here are some key highlights from that era: 1. **Microprocessors**: The invention and commercialization of microprocessors were among the most significant developments in the 1970s. Intel's introduction of the 4004 in 1971, followed by the 8008 and later the 8080, marked the beginning of the microcomputer revolution.

Dharmottara is a figure in Indian philosophy, particularly in the context of Buddhist thought. He is often regarded as a prominent commentator on the works of the Buddhist philosopher Vasubandhu and is known for his contributions to the Yogācāra school of Buddhism. Dharmottara's writings focus on the nature of consciousness, perception, and the epistemological aspects of Buddhist philosophy.

The 20th century saw the development of many influential programming languages that have shaped the field of computer science. Here are some notable programming languages created during that time: 1. **Fortran (1957)** - Short for "Formula Translation," Fortran is one of the oldest high-level programming languages and was primarily designed for scientific and engineering applications.

The 2000s, often referred to as the "early 21st century," was a significant decade in computing characterized by rapid advancements and shifts in technology. Here are some key trends and developments from that era: 1. **Internet Expansion**: The 2000s saw the internet become more mainstream. Broadband internet access became widely available, leading to an increase in online activities, including social networking, e-commerce, and streaming media. 2. **Web 2.

Computer-related introductions in the 21st century encompass a wide array of technologies, trends, and innovations that have transformed how individuals and organizations interact with computers and digital environments. Here are some key aspects: 1. **Personal Computing Evolution**: The 21st century saw significant advancements in personal computing, with the rise of laptops, tablets, and smartphones becoming ubiquitous. Touchscreen interfaces and portable devices have changed how people access and interact with information.