"Memory is something that is retained by either externally or internally perceiving it". Some British churches have highly ornamented porches, both externally and internally. Thanks to this, scientists can study various materials in many ways, both externally and internally. Tecumseh Products Company has subsidiaries that sell externally and internally to Tecumseh. Why is development so externally driven rather than having an internal basis? Internal process improvements in organizations lead to externally observable improvements. Cosmetics are intended to be applied externally. Cooling is via an externally mounted radiator. Driven harmonic oscillators are damped oscillators further affected by an externally applied force "F"("t"). Consider a damped mass on a spring driven by a sinusoidal, externally applied force. These are mecha that are controlled externally. The calorimeter can be calibrated by adiabatically doing externally determined work on it. The reduced size of the device is primarily due to the externally placed antenna. Externally fertilized eggs develop during synchronized spawning. All the ossicles, including those projecting externally, are covered by the epidermal layer.