A ballpoint pen -LRB- also eponymously known in MISC@1 and MISC@2 as a biro and bye-roe in LOCATION@1 and LOCATION@2 but sometimes bee-roh '' elsewhere , named after its credited , though contested , inventor PERSON@1 -RRB- , is a modern writing instrument .

A ballpoint pen -LRB- also called a biro - pronounced `` BY-roe '' - in MISC@1 after its inventor László Bíró -RRB- , is a modern kind of pen for writing .
