Adjective
single-tasking (not comparable)
(computing) Of an operating system, etc., only capable of execution of one task (program or app) at a time, not many tasks simultaneously.
For example, Tim Ferriss has said that in a world of distraction, single-tasking is a superpower. Source: Internet
Types of operating systems Single- and multi-tasking A single-tasking system can only run one program at a time, while a multi-tasking operating system allows more than one program to be running in concurrency. Source: Internet
For the most part, IBM PC/ATs were used as more powerful DOS (single-tasking) personal computers, in the literal sense of the PC name. Source: Internet
One useful constraint to try for greater productivity is extreme single-tasking. Source: Internet