Rényi's parking problem (1958): randomly place unit intervals on [0, L] one at a time (RSA), rejecting overlaps. What fraction of the line is covered at jamming? Answer: θ* = 1−e^{−2} ≈ 0.8647 (average coverage per unit car). In 2D, RSA of disks jams at ≈ 0.547 (vs. 0.9069 for hexagonal packing). RSA appears in protein adsorption, colloidal monolayers, and polymer deposition. The jamming limit is approached logarithmically slowly near saturation.