Scientists can be classified into various fields such as biologists, chemists, physicists, geologists, astronomers, environmental scientists, medical scientists, social scientists, computer scientists, mathematicians, forensic scientists, marine scientists, atmospheric scientists, agricultural scientists, materials scientists, nuclear scientists, data scientists, paleontologists, neuroscientists, and biotechnologists. Each type specializes in specific areas of research and often requires relevant degrees and laboratory skills. Entry-level scientific roles may involve data collection, analysis, and use of specialized tools or software.