3300 System Configuration
The 3300 was a modular system. Although the minimum configuration was for one user, the machine was most cost effective when used in timesharing mode, since most of the cost could be amortized over all the users. Up to 16 users could be accommodated with one CPU, and a system could have up to 64 KB of RAM. I/O was performed using modified IBM Selectric typewriters. Optionally, teletype consoles could be used instead.

According to the press of the time, the line item costs were as follows:

Item ------------------------- Unit Cost
CPU + 4KB RAM ------------------- $4,950
4KB RAM expansion --------------- $2,500
Selectric terminal -------------- $4,200
Terminal control unit ----------- $500
Cassette storage ---------------- $1,400
BASIC software and system setup - $1,500

Besides the cassette storage, 64KB disk and 0.5 MB disk storage was promised for future delivery. In fact, none if it ever happened, and instead paper tape was required. This became a major sore point. According to Dr. Wang's book, it took 40 minutes to load the BASIC interpreter from paper tape. [ Ed. comment (1) ]

The base 3300 configuration was to have the CPU, 12 KB of core memory (three 4 KB boards), two Selectric terminals, a terminal control unit (suitable for controlling up to four Selectrics), cassette storage, and BASIC software, all for a total cost of $17,550. There was an option to do without cassette storage for $15,200.