1. In contact with, on top of
   "the book upon the table"
   - on

1. Being up to particular standard or level especially in being up to date in knowledge
   "up on the news"
   - abreast, au courant, au fait, apace [N. Amer]

See also: informed

Encyclopedia: Upon

• International Phonetic Alphabet
• international pitch
• International Relations and Security Network
• international scale
• International Society for Krishna Consciousness
• International Standards Organization
• International System
• International System of Units
• international terrorism
• International Wanted Notice
• international waters
• Internationale
• internationalisation
• internationalise
• internationalism
• internationalist
• internationalistic
• internationality
• internationalization
• internationalize
• internationally
• interne
• internecine
• internee
• internet