What's the (exact) naming scheme for Dell monitors?

Question

Dell monitors have cryptic model names/codes such as U2312f or E2318H.

The model names is made up of (at least) four elements, exemplified below:

Category	Diagonal Length	Two digits	Final letters
E	23	18	H

Here's what I know about these:

1. Category (1 character):
   E (Economy) / T (Touch) / P (Professional) / S (Studio) / U (Ultrasharp)
2. Diagonal length in inches (including the bezel if I'm not mistaken)
3. A two-digit number
4. Potential combination of several extra letters - upper or lowercase, e.g. H, M, t, f.

Can someone explain the meaning of components 3 and 4?

Answer 1

Since around 2010 the convention has been:

[Series][Diagonal][Year][Ratio or Resolution][Features]

1. Series

• E - Essential. Usually TN anti-glare panel, internal power, simple base, 3-year warranty.
• P - Professional. Usually IPS anti-glare panel, internal power, height/rotate base, 3-year warranty.
• S - Home & Small Office. TN, VA, or IPS panel, usually external power, slim base, 1-year warranty.
• U - UltraSharp. IPS anti-glare panel, internal power, height/rotate base, 3-year warranty.
• UP - UltraSharp with PremierColor. Additional colour gamut.
• AW - Alienware. High-end gaming.
• C - Commercial displays. Large format (>50") for conference rooms and classrooms.

2. Diagonal

• Two digit diagonal viewable size rounded to the nearest inch; halves rounded up.

3. Year

• Two digit year it was released.

4. Ratio or Resolution - The first uppercase letter after the digits is most commonly the aspect ratio or QHD/UHD resolution

• S - standard ratio (4:3 or 5:4),
• no letter - computer widescreen (16:10)
• H - HD widescreen (16:9)
• W - Ultrawide (21:9)
• D - QHD (1440p)
• Q - 4K UHD (2160p)
• K - 8K UHD (4320p)
• The following have also been the first letter, but either on 16:10 (no letter) or discontinued models:
• T - Touch
• M - No HDMI (S/U-series only)
• L - With HDMI (only used when the same model without HDMI exists)
• N - With VGA (only used when the same model without VGA exists)

5. Features - The second uppercase letter after the digits can represent a large variety of features such as:

• C - USB-C input (DisplayPort alternate mode)
• X - HDMI cable included (instead of standard DisplayPort)
• T - Touch
• G - Nvidia G-Sync / Graphics
• F - AMD FreeSync
• J - Wireless charging stand
• Z - Video conferencing camera
• A - Arm included (no stand)
• E - Ethernet connection via the RJ45 port
• S - Speakers built in