1*23f24377SWarner LoshBEGIN { FS = OFS = "\t" } 2*23f24377SWarner Losh$4 ~ /^North America$/ { $4 = "NA" } 3*23f24377SWarner Losh$4 ~ /^South America$/ { $4 = "SA" } 4*23f24377SWarner Losh { print } 5