CENTURY21 PEI REAL ESTATE - Version 1.0 CENTURY21 PEI REAL ESTATE - Very easy to use program. CENTURY21 PEI REAL ESTATE will allow you to access valuable information through a Newsletter and blog, weekly postings of Open Houses, Virtual Tours of homes for sale in PEI, Financial assistance through Centum. CENTURY21 PEI REAL ESTATE is very easy to install and will run from your own desktop. CENTURY21 PEI REAL ESTATE.