List of necessary items for baby...?

so i tried making a list and then i got stuck. im having a shower later on and i was just wanting a list i could slowly mark things off of for when i or someone else got them for me...so what is a list of NECESSARY items that everyone needs. i would like it if things like boppys, bouncers, and boddle warmers were left off...i just want to know the needed things. thanks!!