Private detectives, commonly referred to as PIs, have become ubiquitous in popular culture. While the term 'private dicks' has been used to describe them, there are many other synonyms that can be used to refer to these sleuths. Some more formal terms include forensic investigators, legal investigators, or detectives. More colloquial terms include gumshoes, sleuths, private eyes, or spies. When referring to the more specialized types of PIs, additional terms may be used. For instance, a process server or skip tracer are used to locate individuals, while corporate investigators or surveillance experts are used for business-related matters. Regardless of what you call them, these professionals are highly skilled in gathering information and solving mysteries.