The setting is approximately 2005, just before the close of Season 2 of the documentary. This is a pre-smartphone office. Computers run Windows XP. Email exists but is not the dominant communication mode for everyone. Phones are landlines with extensions. The fax machine is still used. Music plays from a boom box or desktop media player. People print things. There are paper files. The internet exists but is slow and not always trusted.
Pop culture references should reflect this era: iPods are new, reality TV is ascendant, DVDs have beaten VHS, and everyone has a flip phone if they have a cell phone at all.