---
title: "Technical Guides &amp; Resources | SPS Technical"
description: "Access expert guides, industry insights, and useful resources for managing your fire and security systems effectively."
lang: en-GB
json-ld: |
  [
    {
      "@context": "https://schema.org",
      "@id": "https://sps-technical.com/#organization",
      "@type": "Organization",
      "name": "SPS Technical",
      "legalName": "SPS Security Ltd",
      "parentOrganization": {
        "@id": "https://sps-technical.com/#legal-organization"
      },
      "description": "SPS Technical is a trading division of SPS Security Ltd, providing fire alarm, CCTV, intruder alarm and access control system design, installation, maintenance and monitoring across Yorkshire and Lincolnshire.",
      "url": "https://sps-technical.com",
      "logo": "https://media.base44.com/images/public/6989f2350e53aab8836435e3/0ceea3d11_SPSTECHNICALLOGO.jpg",
      "telephone": "+441482226570",
      "email": "info@sps-technical.com",
      "address": {
        "@type": "PostalAddress",
        "streetAddress": "Neptune House, Neptune Street",
        "addressLocality": "Hull",
        "addressRegion": "East Yorkshire",
        "postalCode": "HU3 2BP",
        "addressCountry": "GB"
      },
      "areaServed": [
        {
          "@type": "AdministrativeArea",
          "name": "East Yorkshire"
        },
        {
          "@type": "AdministrativeArea",
          "name": "North Lincolnshire"
        },
        {
          "@type": "AdministrativeArea",
          "name": "Lincolnshire"
        },
        {
          "@type": "AdministrativeArea",
          "name": "South Yorkshire"
        },
        {
          "@type": "AdministrativeArea",
          "name": "West Yorkshire"
        },
        {
          "@type": "AdministrativeArea",
          "name": "North Yorkshire"
        }
      ],
      "knowsAbout": [
        "Fire alarm systems",
        "CCTV systems",
        "Intruder alarm systems",
        "Access control systems",
        "System monitoring",
        "Maintenance and compliance"
      ]
    },
    {
      "@context": "https://schema.org",
      "@id": "https://sps-technical.com/#legal-organization",
      "@type": "Organization",
      "name": "SPS Security Ltd",
      "legalName": "SPS Security Ltd",
      "url": "https://sps-technical.com",
      "taxID": "02738677",
      "address": {
        "@type": "PostalAddress",
        "streetAddress": "Neptune House, Neptune Street",
        "addressLocality": "Hull",
        "addressRegion": "East Yorkshire",
        "postalCode": "HU3 2BP",
        "addressCountry": "GB"
      }
    },
    {
      "@context": "https://schema.org",
      "@type": "WebPage",
      "name": "Technical Guides & Resources | SPS Technical",
      "description": "Access expert guides, industry insights, and useful resources for managing your fire and security systems effectively.",
      "url": "https://sps-technical.com/resources",
      "publisher": {
        "@id": "https://sps-technical.com/#organization"
      },
      "isPartOf": {
        "@type": "WebSite",
        "name": "SPS Technical",
        "url": "https://sps-technical.com"
      }
    },
    {
      "@context": "https://schema.org",
      "@type": "BreadcrumbList",
      "itemListElement": [
        {
          "@type": "ListItem",
          "position": 1,
          "name": "Home",
          "item": "https://sps-technical.com/"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "name": "Resources"
        }
      ]
    }
  ]
---

Established in Hull in 1992 — Fire & Security Systems Across Yorkshire, Lincolnshire & the Humber

[01482 226570](tel:01482226570)| [Contact](/contact)

[![SPS Technical](https://media.base44.com/images/public/6989f2350e53aab8836435e3/0ceea3d11_SPSTECHNICALLOGO.jpg)](/)

Services

[Sectors](/sectors)

Locations

Resources

About Us

[Careers](/careers)[Contact](/contact)

[Request Review](/?section=contact)

1.  [Home](/)
2.  Resources 

Resources & Guides

# Technical Resources & Guides

Practical fire, security, CCTV, intruder alarm and access control resources to help you make informed decisions about maintenance, compliance, system takeovers and project planning.

Explore practical SPS Technical guides, checklists, sector resources and official reference links covering fire alarm maintenance, CCTV health checks, access control, intruder alarms, monitoring and maintenance-led compliance.

Request Custom Documentation

AllFireCCTVIntruder AlarmsAccess ControlSectorsExternal References

## Fire Systems & Compliance

Checklist 

### Fire Alarm Maintenance Checklist

A practical checklist covering what should be inspected, tested and recorded during a scheduled fire alarm maintenance visit under BS 5839-1.

[Fire Alarm Maintenance](/services/fire-alarms/maintenance)[Fire Alarm Systems](/services/fire-alarms)

Request Checklist

Guide 

### BS 5839 Fire Alarm Maintenance Explained

Plain-English explanation of BS 5839-1 maintenance frequency requirements, what they mean for site managers, and how BAFE SP203-1 certification relates to compliance.

[Fire Alarm Maintenance](/services/fire-alarms/maintenance)

Request Guide

Checklist 

### Fire Alarm Takeover Survey Checklist

What to expect from a fire alarm takeover survey — covering documentation, panel condition, detector coverage, zone maps and certification status.

[Fire Alarm Takeovers](/services/fire-alarms/takeovers)[System Takeovers](/services/takeovers)

Request Checklist

Guide 

### Open vs Closed Protocol Fire Alarm Systems

Understand the difference between open and closed protocol fire alarm systems and what it means for your ability to change supplier or upgrade components.

[Fire Alarm Systems](/services/fire-alarms)

Request Guide

Guide 

### False Alarm Reduction & Call-Out Readiness

Practical guidance on reducing false alarm activations, reviewing detector positioning, maintaining call-out procedures and protecting police response arrangements.

[False Alarm Reduction](/services/fire-alarms/false-alarm-management)

Request Guide

## CCTV & Video Surveillance

Checklist 

### CCTV Health Check Checklist

A structured checklist for verifying camera uptime, recording status, storage capacity, image quality and remote viewing functionality.

[CCTV Maintenance](/services/cctv/maintenance)[CCTV Systems](/services/cctv)

Request Checklist

Guide 

### CCTV Recording, Retention & Image Quality Guide

Guidance on recording schedules, retention periods, resolution requirements and what constitutes evidential quality footage.

[CCTV Maintenance](/services/cctv/maintenance)

Request Guide

Guide 

### CCTV GDPR, Signage & Privacy Quick Guide

Practical summary of CCTV operator obligations under UK GDPR, including signage requirements, data subject requests and ICO registration.

[CCTV Systems](/services/cctv)

Request Guide

Checklist 

### Network-Connected CCTV Cybersecurity Checklist

Key steps to secure network-connected CCTV systems — default passwords, firmware, VLAN separation, remote access and patch management.

[CCTV Integration](/services/cctv/integration)

Request Checklist

Checklist 

### Camera Uptime & Recording Failure Checklist

Identify the most common causes of camera downtime and recording failure, and the steps to diagnose and rectify them.

[CCTV Maintenance](/services/cctv/maintenance)

Request Checklist

## Intruder Alarms & Monitoring

Guide 

### Monitored Intruder Alarms & Police Response Explained

How monitored intruder alarm systems work, what a Unique Reference Number (URN) is, and what affects police response under current NPCC policy.

[Intruder Alarm Monitoring](/services/intruder-alarms/monitoring)[System Monitoring](/services/monitoring)

Request Guide

Checklist 

### URN, False Alarms & Police Response Checklist

Steps to protect your URN, reduce false alarm activations and maintain eligibility for confirmed police response.

[Intruder Alarms](/services/intruder-alarms)

Request Checklist

Checklist 

### Intruder Alarm Maintenance Checklist

What should be covered during a scheduled intruder alarm maintenance visit, including detector tests, battery checks and siren function.

[Intruder Alarm Maintenance](/services/intruder-alarms/maintenance)

Request Checklist

Guide 

### Keyholder, ARC & Escalation Readiness Guide

How to maintain effective keyholder arrangements, keep ARC records up to date and ensure your response chain is fit for purpose.

[System Monitoring](/services/monitoring)

Request Guide

Checklist 

### Alarm Takeover Survey Checklist

What to check when taking over an intruder alarm from another provider — covering system grade, ARC contracts, monitoring records and signalling type.

[System Takeovers](/services/takeovers)[PSTN Migration](/services/intruder-alarms/pstn-migration)

Request Checklist

## Access Control

Guide 

### Access Control Best Practice Guide

Practical guidance on access control policy, door hardware selection, credential management and integration with fire and intruder systems.

[Access Control Systems](/services/access-control)

Request Guide

Checklist 

### Leavers, Lost Cards & Credential Audit Checklist

A structured process for removing leavers from access control systems, dealing with lost credentials and conducting periodic access rights audits.

[Access Control](/services/access-control)

Request Checklist

Guide 

### Door Hardware, Maglocks & Emergency Release Considerations

Key considerations for selecting and maintaining mag-lock hardware, fail-safe vs fail-secure configurations, and emergency egress compliance.

[Access Control Installation](/services/access-control/installation)

Request Guide

Checklist 

### Visitor, Contractor & Temporary Access Checklist

Manage temporary access rights for visitors and contractors, including time-limited credentials, escort requirements and audit trails.

[Access Control](/services/access-control)

Request Checklist

Guide 

### Multi-Site Access Control Review Guide

How to review and rationalise access control systems across multiple sites — covering software, credentials, door hardware and integration.

[Access Control Upgrades](/services/access-control/upgrades)

Request Guide

## Sector Guides

Sector Guide 

### Security Systems for Schools & Academies

Fire alarm, intruder, CCTV and access control considerations specific to schools, academies and multi-building education sites.

[Fire Alarm Systems](/services/fire-alarms)[Access Control](/services/access-control)

Request Guide

Sector Guide 

### Fire & Security Systems for Healthcare and Care Sites

Life-safety compliance, CCTV privacy obligations, access control and monitoring considerations for healthcare and residential care environments.

[Fire Alarm Maintenance](/services/fire-alarms/maintenance)[CCTV Systems](/services/cctv)

Request Guide

Sector Guide 

### Retail Parks, Shopping Centres & Multi-Site Estates

Security system management across multi-tenanted retail estates, including site-by-site compliance tracking, monitoring and takeover processes.

[Maintenance & Compliance](/services/maintenance)[System Takeovers](/services/takeovers)

Request Guide

Sector Guide 

### Industrial, Manufacturing & Warehouse Security Systems

Fire alarm and intruder alarm requirements for large-footprint industrial and logistics sites, including perimeter protection and ARC monitoring.

[Intruder Alarms](/services/intruder-alarms)[Fire Alarm Systems](/services/fire-alarms)

Request Guide

Sector Guide 

### Commercial Offices and Managed Buildings

Integrated fire, CCTV, intruder and access control systems for commercial offices, managed buildings and landlord-managed estates.

[Access Control](/services/access-control)[CCTV Systems](/services/cctv)

Request Guide

Sector Guide 

### Construction and Project Handover Security

Temporary and permanent security for construction sites, plus structured handover from construction-phase to operational security systems.

[Electrical Contractors](/contractors)

Request Guide

## Guide Library

Search practical SPS Technical guides and checklists.

AllFire SystemsCCTVIntruder AlarmsAccess ControlSectorsContractors

No guides match your search. Try a different term or category.

## Official Reference Library

Browse British Standards, government guidance, legislation, security policies and recognised industry documents used across fire and electronic security systems.

 All disciplines Fire CCTV Intruder Access Control Cyber Electrical Data Protection Legislation Sectors General All publishers BAFE BSI BSI / IET BSIA Department for Education ETSI Fire Industry Association GOV.UK HM Government Home Office ICO ICO / HM Government National Fire Chiefs Council National Police Chiefs' Council NCSC NPCC SSAIB Surveillance Camera Commissioner All document types Standard Legislation Guidance Industry All statuses Current Under review Superseded Historic Sort: Title A–Z Sort: Reference Sort: Recently checked Sort: Recently updated

65 of 65 references

Title & reference

Publisher

Last checked

Status

Actuation of release mechanisms for doors

BS 7273-4

BSI

29 Jul 2026

Under review 

Alarm systems — intrusion and hold-up systems — application guidelines

DD CLC/TS 50131-7:2010

BSI

29 Jul 2026

Under review 

Alarm systems — intrusion and hold-up systems — system requirements

BS EN 50131-1:2006+A3:2020

BSI

29 Jul 2026

Current 

Alarm transmission systems — general requirements

BS EN 50136-1

BSI

29 Jul 2026

Under review 

Alarm transmission systems — requirements for remote access

PD CLC/TS 50136-10:2022

BSI

29 Jul 2026

Current 

Application-specific requirements for supervised premises transceiver equipment

BS EN 50131-10

BSI

29 Jul 2026

Under review 

Approved Document B — Fire safety

Source link under review

GOV.UK

GOV.UK

31 Aug 2026

Current 

Approved Document M — Access to and use of buildings

Source link under review

GOV.UK

GOV.UK

31 Aug 2026

Current 

[BAFE SP203-1 Fire Detection & Alarm Scheme ](https://www.bafe.org.uk/bafe-fire-safety-guidance/fire-safety-law-and-guidance-england-and-wales)

BAFE SP203-1

[View official source](https://www.bafe.org.uk/bafe-fire-safety-guidance/fire-safety-law-and-guidance-england-and-wales)

BAFE

31 Aug 2026

Under review 

BS 8473:2018 — scope to be confirmed against current BSI record

BS 8473:2018

BSI

29 Jul 2026

Under review 

[BSI Standards — Fire & Security Systems ](https://www.bsigroup.com/en-GB/industries-and-sectors/fire-and-security/)

BSI

[View official source](https://www.bsigroup.com/en-GB/industries-and-sectors/fire-and-security/)

BSI

31 Aug 2026

Current 

[BSIA Access Control Buyers Guide ](https://www.bsia.co.uk/)

BSIA

[View official source](https://www.bsia.co.uk/)

BSIA

31 Aug 2026

Current 

Cloud uplink and remote-management system access

BS EN IEC 62676-2-33:2022

BSI

29 Jul 2026

Current 

Code of practice for the deployment and use of body-worn video

BS 8593

BSI

29 Jul 2026

Under review 

Control and indicating equipment (intrusion and hold-up systems)

BS EN 50131-3

BSI

29 Jul 2026

Under review 

Design, installation and configuration of intruder and hold-up alarm systems designed to generate confirmed alarm conditions

BS 8243:2021

BSI

29 Jul 2026

Current 

Detector-activated CCTV systems — design, installation, commissioning, maintenance, operation and remote monitoring

BS 8418

BSI

29 Jul 2026

Under review 

DfE Good Estates Management — Safety and Security

Source link under review

Department for Education

Department for Education

31 Aug 2026

Current 

Electronic access-control systems — application guidelines

BS EN 60839-11-2:2015

BSI

29 Jul 2026

Current 

Electronic access-control systems — system and component requirements

BS EN 60839-11-1:2013

BSI

29 Jul 2026

Current 

[ETSI EN 303 645 — Security for Consumer IoT ](https://www.etsi.org/deliver/etsi_en/303600_303699/303645/)

ETSI EN 303 645

[View official source](https://www.etsi.org/deliver/etsi_en/303600_303699/303645/)

ETSI

31 Aug 2026

Current 

[FIA Guidance on Fire Alarm Maintenance ](https://www.fia.uk.com/)

Fire Industry Association

[View official source](https://www.fia.uk.com/)

Fire Industry Association

31 Aug 2026

Current 

[Fire detection and fire alarm systems for buildings — Code of practice ](https://www.bsigroup.com/en-GB/standards/)

BS 5839-1

[View official source](https://www.bsigroup.com/en-GB/standards/)

BSI

31 Aug 2026

Current 

Fire detection and fire alarm systems for buildings — Code of practice for domestic premises

BS 5839-6

BSI

29 Jul 2026

Current 

GOV.UK — Recommended standards for the surveillance camera industry

Source link under review

GOV.UK

GOV.UK

31 Aug 2026

Current 

ICO CCTV Code of Practice

Source link under review

ICO

ICO

31 Aug 2026

Historic 

[ICO CCTV Guidance for Small Business Operators ](https://ico.org.uk/for-organisations/sme-web-hub/)

ICO

[View official source](https://ico.org.uk/for-organisations/sme-web-hub/)

ICO

31 Aug 2026

Current 

[ICO CCTV self-assessment checklist ](https://ico.org.uk/for-organisations/)

ICO

[View official source](https://ico.org.uk/for-organisations/)

ICO

31 Aug 2026

Under review 

ICO guidance on biometric data and biometric recognition

Source link under review

ICO

ICO

31 Aug 2026

Under review 

ICO video-surveillance guidance for organisations

Source link under review

ICO

ICO

31 Aug 2026

Under review 

IET Wiring Regulations — Requirements for Electrical Installations

BS 7671

BSI / IET

29 Jul 2026

Current 

Interconnections using radio-frequency techniques (intrusion and hold-up systems)

BS EN 50131-5-3

BSI

29 Jul 2026

Under review 

Interoperability profiles for video management and cloud VSaaS systems

BS EN IEC 62676-2-11:2024

BSI

29 Jul 2026

Current 

Intruder and hold-up alarm systems — commissioning, maintenance and remote support

BS 9263:2016

BSI

29 Jul 2026

Current 

Intrusion detectors (BS EN 50131-2 series)

BS EN 50131-2 series

BSI

29 Jul 2026

Under review 

IP interoperability implementation using web services

BS EN 62676-2-3

BSI

29 Jul 2026

Under review 

IP interoperability using HTTP and REST services

BS EN 62676-2-2:2014

BSI

29 Jul 2026

Current 

Management and operation of CCTV systems

BS 7958

BSI

29 Jul 2026

Under review 

Monitoring and alarm receiving centre requirements

BS EN 50518

BSI

29 Jul 2026

Under review 

NCSC Cyber Security for Smart Devices

Source link under review

NCSC

NCSC

31 Aug 2026

Current 

[NFCC Fire Safety Guidance for Businesses ](https://www.nationalfirechiefs.org.uk/)

National Fire Chiefs Council

[View official source](https://www.nationalfirechiefs.org.uk/)

National Fire Chiefs Council

31 Aug 2026

Current 

NPCC Security Systems Policy

NPCC SSP

NPCC

29 Jul 2026

Under review 

[NPCC Security Systems Policy ](https://www.securedbydesign.com/)

NPCC Security Systems Policy

[View official source](https://www.securedbydesign.com/)

National Police Chiefs' Council

31 Aug 2026

Under review 

Performance testing and grading of real-time intelligent video-content analysis

BS EN IEC 62676-6:2026

BSI

29 Jul 2026

Current 

Power supplies (intrusion and hold-up systems)

BS EN 50131-6

BSI

29 Jul 2026

Under review 

Regulatory Reform (Fire Safety) Order 2005

RRO 2005

HM Government

29 Jul 2026

Current 

[Regulatory Reform (Fire Safety) Order 2005 ](https://www.legislation.gov.uk/uksi/2005/1541/contents)

SI 2005/1541

[View official source](https://www.legislation.gov.uk/uksi/2005/1541/contents)

HM Government

31 Aug 2026

Current 

Remote centres receiving signals from alarm systems

BS 8591

BSI

29 Jul 2026

Under review 

Requirements for supervised premises transceiver equipment

BS EN 50136-2

BSI

29 Jul 2026

Under review 

Requirements for the provision of secure remote services for fire-safety systems and security systems

BS EN 50710:2021

BSI

29 Jul 2026

Current 

Scheme for the application of European Standards for intrusion and hold-up alarm systems

PD 6662:2017

BSI

29 Jul 2026

Current 

Screening of individuals working in a secure environment

BS 7858:2019

BSI

29 Jul 2026

Current 

Secure destruction of confidential and sensitive material

BS EN 15713:2023

BSI

29 Jul 2026

Under review 

[SSAIB — Security Systems & Alarms Inspection Board ](https://www.ssaib.org/)

SSAIB

[View official source](https://www.ssaib.org/)

SSAIB

31 Aug 2026

Current 

[Surveillance Camera Code of Practice (amended, effective 12 January 2022) ](https://www.gov.uk/government/publications/surveillance-camera-code-of-practice)

Home Office

[View official source](https://www.gov.uk/government/publications/surveillance-camera-code-of-practice)

Home Office

31 Aug 2026

Current 

[Surveillance Camera Commissioner ](https://www.gov.uk/government/organisations/surveillance-camera-commissioner)

Surveillance Camera Commissioner

[View official source](https://www.gov.uk/government/organisations/surveillance-camera-commissioner)

Surveillance Camera Commissioner

31 Aug 2026

Under review 

[Surveillance camera guidance, tools and templates ](https://www.gov.uk/government/collections/surveillance-camera-guidance-tools-and-templates)

GOV.UK

[View official source](https://www.gov.uk/government/collections/surveillance-camera-guidance-tools-and-templates)

GOV.UK

31 Aug 2026

Under review 

[UK General Data Protection Regulation and Data Protection Act 2018 ](https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/)

UK GDPR / DPA 2018

[View official source](https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/)

ICO / HM Government

31 Aug 2026

Current 

Video surveillance systems — application guidelines

BS EN 62676-4:2015

BSI

29 Jul 2026

Under review 

Video surveillance systems — performance requirements for video transmission

BS EN 62676-1-2:2014

BSI

29 Jul 2026

Current 

Video surveillance systems — system requirements and general

BS EN 62676-1-1:2014

BSI

29 Jul 2026

Current 

Video surveillance systems for use in security applications

BS EN 62676

BSI

29 Jul 2026

Under review 

Video transmission interfaces

BS EN 62676-3

BSI

29 Jul 2026

Under review 

Video transmission protocols — general requirements

BS EN 62676-2-1:2014

BSI

29 Jul 2026

Under review 

Warning devices (intrusion and hold-up systems)

BS EN 50131-4

BSI

29 Jul 2026

Under review 

Only publicly accessible sources are listed. Source links are verified weekly by an automated link-checker; a "Source link under review" note means the external URL is temporarily unavailable and is being re-checked. Licensed British Standard PDFs, subscriber-only documents and internal SPS procedures are held backend-side and are not exposed here.

## Compliance Tools

Free 

Use our free online tools to get an initial indication of your compliance position, PSTN signalling risk and system health — no account needed, results in under two minutes.

### Compliance Due Date Calculator

Find out when your next maintenance visit is due based on your system type and last service date.

[Use this tool](/tools/compliance-calculator)

### PSTN Switch-Off Checker

Get an initial indication of your alarm signalling risk from the PSTN switch-off based on your postcode area.

[Use this tool](/tools/pstn-checker)

### System Health Self-Assessment

Answer 10 questions to get a broad indication of your system health and compliance status.

[Use this tool](/tools/health-assessment)

[View all tools](/tools)

Free Self-Assessment 

### System Health Self-Assessment

Answer 10 questions about your fire and security systems to get a broad indication of your maintenance and compliance status. Results are indicative only — no account needed.

Takes 2–3 minutes — no account needed

[Use This Tool](/tools/health-assessment)

### Need something specific?

We can provide tailored technical documentation, compliance reports and maintenance proposals for your site.

Request Custom Documentation[Call 01482 226 570](tel:01482226570)

![SPS Technical](https://media.base44.com/images/public/6989f2350e53aab8836435e3/0ceea3d11_SPSTECHNICALLOGO.jpg)

Commercial fire, CCTV, intruder alarm and access control systems — designed, installed, maintained and monitored across Yorkshire, Lincolnshire and the Humber.

#### Services

-   [Fire Alarm Systems](/services/fire-alarms)
-   [CCTV Systems](/services/cctv)
-   [Intruder Alarm Systems](/services/intruder-alarms)
-   [Access Control Systems](/services/access-control)
-   [System Monitoring](/services/monitoring)
-   [Guarding & Patrols](/services/guarding-mobile-response-keyholding)
-   [Maintenance & Compliance](/services/maintenance)
-   [System Takeovers](/services/takeovers)
-   [All Services](/services)

#### Company

-   [About SPS Technical](/about)
-   [Our Story](/about/our-story)
-   [How We Work](/about/how-we-work)
-   [Values & Ethos](/about/values-ethos)
-   [Accreditations & Compliance](/about/accreditations-compliance)
-   [Sustainability & Social Value](/about/sustainability-social-value)
-   [Careers](/careers)
-   [Contractor Support](/contractors)
-   [Guides](/resources)
-   [Tools & Resources](/tools)
-   [Locations & Coverage](/locations)
-   [Customer Feedback](/customer-feedback)

#### Accreditations

SSAIB BAFE ISO 9001 SafeContractor Constructionline 

© 2026 SPS Security Ltd. SPS Technical is a trading division of SPS Security Ltd and part of SPS Group.

[Request a Technical Review](/?section=contact)