The acronym GIS is sometimes used for geographic information science (GIScience) to refer to the academic discipline that studies geographic information systems and is a large domain within the broader academic discipline of geoinformatics.[1] What goes beyond a GIS is a spatial data infrastructure, a concept that has no such restrictive boundaries ...
Percy Jackson & the Olympians. Percy Jackson & the Olympians, often shortened to Percy Jackson, is a pentalogy of adventure and mythological fiction books written by American author Rick Riordan. Five supplementary books, along with three graphic novels, have also been released.
Percy Jackson and the Sword of Hades (Percy Jackson and the Olympians, #4.5) by Rick Riordan (Goodreads Author) 4.29 avg rating â 15,779 ratings â published 2009 â 6 editions book 4.5