In the mid-to-late 1980s, was a well-known name among software developers using IBM PCs and compatibles.

I’ve been using for a few weeks now, and my honest takeaway is that it is a genuinely useful tool for regaining focus. The interface is clean and intuitive, and it does exactly what it promises: it helps you rise above the daily noise to see the bigger picture.

Traditional periscopes use mirrors and prisms set at 45-degree angles to direct light down a tube. Modern submarines have largely replaced these with photonic masts —digital sensors that transmit images to a screen, often controlled by cost-effective Xbox 360 controllers . 2. The Digital Legacy: The Periscope App

In the early days of manned spaceflight, particularly during Project Mercury , the spacecraft were equipped with actual periscopes to help astronauts see the Earth and verify their position.

The sun was shining and my first care was for someone who could possibly spot my boat by accident. Maybe I should wait for the nig... Steam Community compute-atari-st-issue-04.pdf - Atarimania We'll come to periscope depth for our return. punch. P. P. Range 2100 Target 15 Tanker. 6000 Tons. sch + 252 32, "0715 Hours. Torp... Atarimania 8 sites Periscope - Wikipedia A periscope is a device for observation over, around or through an object, obstacle or condition that prevents direct line-of-sigh... Wikipedia periscope | Glossary - Developing Experts Etymology. Your browser does not support the audio element. The word "periscope" is derived from the Greek words "peri" (around) a... Developing Experts Periscope | Submarine, Viewing, Mirrors - Britannica Mar 25, 2026 —

For modern audiences, "OK, periscope" is most frequently heard in tactical submarine games like .

The phrase is iconic in submarine cinema and simulations. For example, in the classic 1955 film Above Us The Waves , the commanding officer uses the exact confirmation "OK, periscope depth" before identifying land targets.