CREATE TABLE table_name_73 (screen_size__inch_ VARCHAR, intro_year VARCHAR, model VARCHAR)

Name the size of the screen that came out in 2006 and is iliad
SELECT screen_size__inch_ FROM table_name_73 WHERE intro_year = "2006" AND model = "iliad"
SELECT "screen_size__inch_" FROM "table_name_73" WHERE "2006" = "intro_year" AND "iliad" = "model"