And/or

And/or is an English grammatical conjunction used to indicate that one or more (or even all) of the cases it connects may occur. It is used as an inclusive or (as in logic and mathematics), because saying "or" in spoken language (or writing "or") might be inclusive or exclusive.

The construction has been used in official, legal and business documents since the mid-19th century, and evidence of broader use appears in the 20th century.^[1] It has been criticized as both ugly in style—by many style guides, including the classic The Elements of Style (from William Strunk, Jr. and E.B. White)—and ambiguous in legal documents—by American and British courts.