Seasonal ARIMA and Exponential Smoothing

Modeling seasonality in prices, volumes, and volatility with SARIMA and Holt-Winters methods. (Page 92)

Silicon photonics

Moving data with light on a chip, and why it has become a data-center power story. (Page 59)

Single-board computer

The category of full computers built on a single circuit board, from hobby boards to industrial embedded PCs. (Page 68)

SNMP

The Simple Network Management Protocol, still the default way to ask network and server gear for its status. (Page 67)

State Space Models and the Kalman Filter

Filtering and smoothing latent states, from dynamic betas to hidden regimes in financial time series. (Page 93)

Static transfer switch

A millisecond solid-state switch that protects a single dual-corded load. (Page 25)

Stationarity and Unit Root Tests

Testing whether a series is stable over time, and why non-stationarity ruins forecasts and inference. (Page 94)

Stochastic Calculus in Finance

Ito's lemma, stochastic differential equations, and the boundary between derivative pricing and predictive trading. (Page 95)

Stress Testing and Scenario Design

Building adverse scenarios, measuring portfolio damage, and going beyond correlation matrices when markets break. (Page 96)

The Standby Engine

The engine-driven source that carries the site through a prolonged outage. (Page 9)