Il "cellular office" è l'ufficio chiuso o separato da divisori o mura dove l'impiegato ha maggiore privacy e silenzio rispetto all'open plan office o open space office dove non ci sono mura e gli impiegati sono a diretto contatto.

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Note added at 3 hrs 13 mins (2004-07-10 18:47:56 GMT)
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Cellular Offices

This is the traditional type of office. This is normally rectangular and similar in size to a medium-sized room with doors and windows. It takes its name from the fact that it is a self-contained room. (....)

Open plan offices
An open plan office, in contrast to the cellular office, is furnished as one integrated office and will be invariably be partitioned into smaller offices. The partitioning itself normally consists of screens, but may consist solely of plants in pots or stands. The open-plan office generally accommodates staff from different grades and is favoured by firms adopting the \"one stop shop\" approach.

guarda questo link, c\'è una spiegazione completa sui vari tipi di ufficio tra cui il \"cellular office\":
http://www.olivermagro.com/Office_Skills/Lecture_3.htm