All telecom standards use standard SI prefixes. E.g. 1982 Etherenet specification: http://decnet.ipv7.net/docs/dundas/aa-k759b-tk.pdf

> a data rate of 10 Megabits per second

> Data rate: 10 Million bits/sec

RAM modules have to have power-of-two size for technical reasons. These reasons do not apply to telecom, magnetic storage, etc. Has nothing to do with "binary".