The phrase "assigned letters" is correct and usable in written English.
It can be used when referring to letters that have been designated or allocated for a specific purpose or task.
Example: "In the coding exercise, each participant was given assigned letters to represent their unique identifiers."
Alternatives: "designated letters" or "allocated letters".
Cannon inherited a system started by Williamina Fleming, who assigned letters of the alphabet to the various categories of stellar spectra.
He assigned letters to these lines, by which some are still known, such as the D-lines of sodium, the G-band, and the K-lines of ionized calcium.
In this system, antigens were eventually assigned letters and numbers (e.g., HLA-B51 or, shortened, B51).
His catalogue assigned letters from the Greek alphabet to groups of stars belonging to the same visual magnitude class in each constellation, beginning with alpha for a star in the brightest class.
Positive KORp-immunoreactive (ir) cells were quantified from 2 4 separate BLA slices taken from 2 4 animals (fields of 600 µm2) that were assigned letters and counted by investigators blind to treatment group.
We assigned letters and numbers to PFGE types and subtypes, respectively.
Schools are assigned letter grades, and students at schools that fail become eligible for vouchers, which can then be used to help pay for a private school education.
For grading, students are assigned letter grades (A, B, C, D, F) which are associated with a percentage (for example: an A is worth 4.0).
The scores also will affect nearly every level of the system, with teachers and principals eligible for financial bonuses based on test results, and individual schools assigned letter grades based on student improvement.
Evaluation / Assessment: Students will be evaluated based on participation in class and group discussions, contribution to group research, individual summaries of the research, and thoughtful completion of the assigned letter to the Iraqi Governing Council.
The survey reports respond to the popular interest in ranking academic programs, and visitors to the survey Web site will see that the authors have assigned letter grades (A+ to F-) to departments based on survey responses.
