Free AI library

Learn AI.Free forever.

1019 plain-English guides, structured learning paths, and an open library — built by an independent 501(c)(3) nonprofit so anyone can understand modern AI.

1019Free guides
9Topic tracks
~2 minPer guide
~34hReading time

Start here

Five outcome-based courses

Each course includes explicit outcomes, mapped competencies, practice activities, and an applied capstone.

Topic tracks

Browse by track

Jump into the area you care about. Every track has multiple plain-English guides.

Full library

All guides

1019 of 1019 guides shown. Filter by track or search above.

Industries

AI in Public Health and Epidemiology

AI helps public-health agencies spot outbreaks earlier, model how diseases spread, and target interventions across whole populations rather than single…

2 min readRead
Industries

AI in Clinical Trials

AI is reshaping how new drugs are tested — finding eligible patients faster, predicting which trials will succeed, and catching safety signals sooner.

2 min readRead
Language AI

QLoRA and 4-Bit Fine-Tuning

QLoRA is a technique that lets you fine-tune a massive language model on a single consumer GPU by storing the frozen model in just 4 bits per weight.

2 min readRead
Language AI

Repetition Penalty and Decoding Controls

Decoding controls are the knobs that decide how a language model picks each next word from its probability distribution.

2 min readRead
Visual AI

Diffusion Transformers

Diffusion Transformers (DiTs) swap the convolutional U-Net at the heart of image and video generators for a Transformer backbone.

2 min readRead
Technical

Adam and Adaptive Optimizers

Adam is the workhorse optimizer behind most modern neural networks, automatically tuning a separate learning rate for every parameter.

2 min readRead
Technical

Learning Rate Scheduling

A learning rate schedule changes the step size during training instead of holding it fixed.

2 min readRead
Technical

Layer Normalization

Layer normalization stabilizes training by rescaling the activations within each individual example so they have zero mean and unit variance.

2 min readRead
Industries

AI in Nutrition and Dietetics

AI in nutrition uses food databases, image recognition, and predictive models to personalize diets, estimate intake, and support clinical decisions.

2 min readRead
Industries

AI in Physical Rehabilitation

AI in physical rehabilitation uses motion tracking, wearables, and adaptive software to guide exercises, measure progress, and personalize recovery.

2 min readRead
Industries

AI in Law Enforcement and Policing

AI in policing spans facial recognition, predictive policing, license-plate readers, and gunshot detection.

2 min readRead
Visual AI

Feature Pyramid Networks

Feature Pyramid Networks (FPN) let detectors spot objects at wildly different sizes by building a multi-scale 'pyramid' of features cheaply.

2 min readRead

Finished reading? Prove it.

Check what you learned with topic quizzes, then explore our structured courses and current certification requirements. Core guides remain free to read.