This was realised in the development of imageboard software (futaba.php, later yotsuba.php that runs 4chan) in the naming images, which is a unix timestamp + ra

This was realised in the development of imageboard software (futaba.php, later yotsuba.php that runs 4chan) in the naming images, which is a unix timestamp + random 3 digit number because just the timestamp often causes clashes.