single!
The noun computer is the singular form; the plural form is computers.
Computers is the plural form of computer.
singular possessive = computer's The computer's screen is broken. plural possessive = computers' The computers' screens are broken
practitioner is singular (plural practitioners)sofa is singular (plural sofas)satellite is singular (plural satellites)clips is plural (singular clip)dentist is singular (plural dentists)dollars is plural (singular dollar)article is singular (plural articles)magazines is plural (singular magazine)laminator is singular (laminators is plural)radios is plural (singular radio)
singular and plural
Singular: book / Plural: books Singular: cat / Plural: cats Singular: child / Plural: children Singular: foot / Plural: feet
Are is plural. "Is" is singular. For example, "There is a glove on the chair". That is singular. "There are gloves on the chair". That is plural.
"Has" is singular, e.g. He has, she has. "Have" is plural, e.g. They have, we have. The exception is "I" - e.g. I have.
The plural of "Computer" in German is "Computer." The word is used in the same form for both singular and plural, similar to some other loanwords in the language. To specify the plural, you might use phrases like "viele Computer" (many computers) if needed for clarity.
The word team is singular; the plural form is teams.
Who may be singular or plural.
This is singular. These is the plural form.