Altium designer是altium公司开发的一款电子设计自动化软件，用于原理图、PCB、FPGA设计。结合了板级设计与FPGA设计。2005年之前叫做Protel。收购来的PCAD及TASKING成为了 altium designer 的一部分。2009年推出altium designer winter09。在高速电路板布线方面，可进行差分对布线。最新版本是Altium Designer 16.0.5。

Protel stands for "Procedure Oriented Type Enforcing Language". It is a programming language created by Nortel Networks and used on telecommunications switching systems such as the DMS-100. Protel-2 is the object-oriented version of Protel.

PROTEL languages were designed to meet the needs of digital telephony and is the basis of the DMS-100 line of switching systems PROTEL is a strongly typed, block-structured language which is based heavily on PASCAL and ALGOL 68 with left-to-right style of variable assignment, variable-sized arrays, and extensible structures. The designers of PROTEL significantly extended PASCAL of the day by adding external compilation and extending the data structures available in the language.