BCL Molecular BCL Molecular BCL Molecular

| Model | Released | Usage_ | Features | Storage_ |
|---|---|---|---|---|
| Mark 2 | 1973 | Sales Order Processing | Totally new processor with hardware interrupt stacking, a variable cycle time and new disc controller. Same basic architecture as the MK1. Used a totally new OS. , Water-cooled cabinets with remote chiller unit initially, later normal fan cooling. | Fabritek or EMM ferrite core memory. Introduced the DD1600 CDC 9427 top-loading disk drive one fixed one removable and/or a large multi-platter CDC removable disk drive. |
| Mark 3 |  |  | Designation not used but was effectively the 3ME/6ME which was a MK2 processor modified to run the MK1 OS and application software. Hardware interrupt stacking disabled. Used a low capacity version of the CDC 9427 |  |