The phrase "a competing system" is correct and usable in written English.
It can be used when discussing systems, organizations, or technologies that are in competition with one another.
Example: "The new software was designed to outperform a competing system that has dominated the market for years."
Alternatives: "an alternative system" or "a rival system".
A competing system, known as the Auburn model, arose a few years later.
AT&T has developed a competing system and is also starting field trials.
The Board of Trade joined the venture in May after abandoning plans to develop a competing system.
That is, the more search ads it handles, the more money it will make and the harder it will be for anyone else to build a competing system.
Israel is developing a competing system, the Arrow, with assistance from the United States; General Shomron heads the state-owned weapons complex.
In a particularly noteworthy challenge, Mr. Bezard noted, Mastercard recently announced a partnership with Certapay, a Toronto technology company that could give Mastercard the technical means to create a competing system.
It stresses however that if some satisfactory arrangement can't be reached then the UK will develop an alternative, competing system.
But calls by airlines and governments to agree to a global system first through the U.N. organization to avoid a patchwork of competing systems have only further exasperated E.U. officials, who have shown few signs of backing down.
Ancien régime France, like most nations of the time, contained a mess of competing systems of measurement, with standards varying by region, town, and trade.
There are a number of competing systems to this including attempts by Apple and Google to improve indoor positioning.
It is not uncommon in large companies or companies that have grown through acquisition to have a number of competing systems all in simultaneous operation.
