Impress or Impression may refer to:

• OpenOffice.org Impress, a presentation program included in the OpenOffice.org office suite.
• Lotus Impress a WYSIWYG editor for Lotus 1-2-3.
• OfficeMax ImPress Print & Document Services, a division of OfficeMax, Inc. specializing in the pay-for-print industry
• Impressment is the act of conscripting people to serve in the military or navy.
• Impression is a synonym for a print run in the publishing industry.
• Impression seal, a type of accent seal.
• Impression, Sunrise, a painting by Claude Monet.
• Cost Per Impression, a term used in online marketing for measuring the worth and cost of a specific e-marketing campaign.
• Case of first impression, a case or controversy over an interpretation of law never before reported or decided by that court.
• Present sense impression, in the law of evidence, is a statement made by a person that conveys their sense of the state of certain things at the time the person was perceiving the event, or immediately thereafter.
• Maternal impression, an obsolete scientific theory that explained the existence of birth defects and congenital disorders.
• Big Impression, a British comedy sketch show.
• Impression (Dragonriders of Pern), a joining of the minds in the Dragonriders of Pern fictional universe.

OpenOffice.org Impress est le logiciel de présentation de la suite bureautique libre OpenOffice.org.

OpenOffice.org (OOo) är en samling kontorsprogram som härstammar från programvaruföretaget Sun Microsystems kontorsprogram StarOffice, ursprungligen utvecklat av Star Division. Det består av de delar av StarOffice vars källkod Sun har släppt fri. De delar av källkoden som inte släppts fri, exempelvis ordlistorna för stavningskontroll och synonymer, säljs fortfarande som en del av StarOffice. OpenOffice.org konkurrerar med Microsoft Office, men ligger fortfarande långt efter i termer av marknadsandelar.