How are social media platforms abused​

The forerunner to cell phones, pdas, and smartphones was

When is it appropriate to use an absolute reference

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most? a)give the file a unique name b)name the file in yymmdd format c)use descriptive name while naming the files d)use capital letters while naming the file