nSimilar
software must run on many types of mobile
devices
nMany
brands and models of mobile devices
ndiffer in
platforms, communication protocols, display
units, memory size, etc.
n640x200 color
screen vs. 100x80 mono display
n80M memory vs.
less than 100kb memory
nRPGs
must perform well on all those devices
nDevelopment
cost, time-to-market are factors