The phrase "array of letters" is correct and usable in written English.
It can be used to describe a collection or assortment of letters, often in contexts related to language, coding, or puzzles.
Example: "The puzzle required us to decode the array of letters to find the hidden message."
Alternatives: "collection of letters" or "set of letters".
The problem is distinguishing between the array of letters and acronyms advisers can list after their names.
Both are simple apps that turn photos into an array of letters that, from afar, look like the original image.
Right now, older Americans looking for financial guidance encounter professionals using a bewildering array of letters after their names.
Wilmette, Ill., a Chicago suburb, replaced a confusing array of letters, numbers and symbols with a standards-based format for grades one through four this year.
A commentary on The Times Op-Ed page last week proposed creation of a New York Times endowment, like a university; that provoked an interesting array of letters.
Photographic portraits of the writers and eight original caricatures by David Levine, coupled with a wide array of letters and manuscripts, complement the published works in the exhibition.
– In line with this hypothesis, previous studies found an effect of perceptual difficulty on dwell times [8]: For instance, when observers have to search for a letter in an array of 10×10 letters, increasing the luminance contrast of all stimuli significantly decreased mean dwell times, from 251 ms in the lowest contrast condition, to 194 ms in the highest contrast condition [8] [10].
In this task, the child was presented with an array of 100 letters printed on an 8.5" × 11" sheet of white paper and was asked to scan the letters and to cross out all 20 instances of the target letter "X" quickly and accurately.
Drawing on a remarkable array of diaries, letters, memoirs, and surveys, Kynaston assembles a polyphonic history of a pivotal time.
In the seminar, versions of which Sandweiss or her postdoctoral fellows have taught each year since 2013, students pored over a wide array of sources: letters, diaries, wills, sermons, speeches, newspaper advertisements, census data, genealogy records, student directories, the minutes of University trustee and faculty meetings.
As if the ordeal of losing her life partner of 65 years weren't bad enough, she now had to deal with a bewildering array of bills, letters, explanations of benefits, "this is not a bill" bills and dunning notices.
