In 1984 sinclair launched the QL, Quantum Lap, as a computer aimed to a more professional sector, it has some revolutionary aspects (it was based in the 68008 Processor, a 32 bit processor with a 8 bit interface, ( 8 bit connectors and hardware was cheaper and price was always one of the basic features of Sinclair machines).
The system has a revolutionary "multi tasking BASIC interpreter", 128 Kb of RAM and instead of using the expensive floppy drives (remember 1984 , 5' 1/4 floppy were still common in 1990, or the slow and sequential tape system (like the spectrum ), uses their own technology , the "microdrive"
As the tape runs quite fast, the tape must be formatted in sectors , so it can be used as a random
device (instead of the typical sequential tapes).
The machine provides two serial interfaces and was able to connect to other QL machines using their own network protocol (similar to token ring), and be connected to a normal TV or a computer monitor, also has serial interfaces ,