Muscle memory for the syntax you keep forgetting.
Reading syntax doesn't make it stick; typing it does. Each crammer opens on a contents dashboard so you can see exactly what's covered, drill one topic at a time or run the whole deck, and every card goes through three passes until you can produce it from memory. Miss one, and it circles back until you don't.
Your progress is saved in your own browser between visits — nothing is installed and nothing is uploaded. Works offline once loaded.
Learn
See what the command does, its exact syntax, and the gotchas worth knowing.
Copy
Type it once while looking — the target lights up green as you match it.
Recall
Type it from memory. Missed cards resurface later in the session until they stick.
Excel Formulas
From SUM to XLOOKUP, INDEX/MATCH, dynamic arrays and structured references — the formulas that do real work, including the $ locks and gotchas that usually trip people up.
Open crammer →Bash & Linux Commands
The terminal essentials: navigating, managing files, grep and find, pipes and redirection, permissions, processes and remote access — typed until they're reflex.
Open crammer →PowerShell
The Verb-Noun commands behind Windows automation: files and folders, the object pipeline, JSON and CSV data, web requests — plus the aliases that map them back to Bash.
Open crammer →MCP Config JSON
The JSON that wires AI tools together: strings, arrays and nesting done right, local and remote server entries, and the safe way to handle secrets with environment variables.
Open crammer →